Showing posts with label wildlife. Show all posts
Showing posts with label wildlife. Show all posts

Tuesday 26 September 2023

Giant Reeds, Eucalyptus Trees and Rubbish Destroy a River in Portugal

Ribeira do Marchante is a vanishing river


There is a river in Quinta do Conde in Portugal known as the Ribeira do Marchante or the Ribeira de Coina. It was once a navigable river that had a lot of water and even supported rice fields back in the 1800s. Today it can be difficult to see, and difficult to find any stretches of water that are not choked with Giant Reeds (Arundo donax) and other vegetation.

In the droughts that are now a new normal in Portugal due to Climate Change, the bed of this river is often dry for much of its course, and for much of the year. Rubbish and fly-tipping litter its banks and surrounding areas.

Some of this trash is in the river itself. This river is disappearing. The land next to it has many Eucalyptus trees. They are known to take a lot of groundwater from any land they are growing in. This non-endemic tree is adding to the threats to the river’s health. I have lived in Quinta do Conde for eight years and have seen the Ribeira do Marchante in much better condition in the first years I was here. In the past I have seen ducks swimming on it, Iberian Water Frogs (Pelophylax perezi)

in many parts, and I have even seen a rare European Pond Tortoise (Emys orbicularis) dive into the water. On World Rivers Day (24 September), with the EcoGrupo Trevo, local environmental conservation group, I went walking the route of the Ribeira do Marchante, including a part that I was not familiar with. I was horrified to see how much Giant Reed is now growing in and along the river. If it continues like this there will be no water flowing. The Giant Reed is an invasive species and creates problems in many parts of the world. It is resistant to fires because it can regenerate, it uses up a lot of water, its roots go deep into the soil making it hard to remove, it spreads rapidly, it grows very quickly, and it displaces native vegetation while destroying wildlife habitat. As for the Eucalyptus trees, several years ago a team of men cut down some of the trees near the Sports Stadium, which is close to the river. However, they left the stumps and soon after the trees sprouted again. 

The Eucalyptus recovers quickly when felled, and also regenerates after being burned in wildfires. This tree is causing a big problem in many parts of Portugal. In addition to all this, paths through the woodland on the banks of the river are being churned up by trail bike riders, people on 4-wheelers, and we even encountered a car actually driving along the riverbed in one part. All of this causes sand to wash down into the river in storms. My conclusion is that the Ribeira do Marchante needs help, and needs help urgently or it will continue to decline fast and will eventually be no more than a memory. I am a member of ESRAG (Environmental Sustainability Rotary Action Group) and this group is very concerned with restoration of rivers and wetland. There is an Adopt a River group. I am also an active member in SAVE THE FROGS! a charitable organisation that, as its name suggests, is dedicated to saving frogs and other amphibians worldwide. There are grants available from Rotary and from SAVE THE FROGS to fund the sort of work that would be needed to save the Ribeira do Marchante. I am hoping that the money can be found to fund a restoration project. I think something should be done to halt the destruction of this river before it is too late.

Portuguese:

A Ribeira do Marchante é um rio em extinção


Existe um rio na Quinta do Conde em Portugal conhecido como Ribeira do Marchante ou Ribeira de Coina. Já foi um rio navegável que tinha muita água e até sustentava campos de arroz no século XIX. Hoje pode ser difícil ver e encontrar trechos de água que não estejam obstruídos por Canas/Juncos gigantes (Arundo donax) e outras vegetações. Nas secas que são agora uma nova normalidade em Portugal devido às Alterações Climáticas, o leito deste rio fica frequentemente seco durante grande parte do seu curso e durante grande parte do ano. Lixo e despejos espalhados pelas margens e áreas adjacentes. Parte desse lixo está no próprio rio. Este rio está desaparecendo. O terreno ao lado possui muitos eucaliptos. Sabe-se que retiram muita água subterrânea de qualquer terreno onde crescem. Esta árvore não endémica está a aumentar as ameaças à saúde do rio. Moro na Quinta do Conde há oito anos e vi a Ribeira do Marchante em muito melhores condições nos primeiros anos que aqui estive. No passado, vi patos nadando nele, rãs d'água ibéricas (Pelophylax perezi) em muitas partes, e até vi uma rara tartaruga europeia (Emys orbicularis) mergulhar na água.

No Dia Mundial dos Rios (24 de Setembro), com o EcoGrupo Trevo, grupo local de conservação ambiental, fui percorrer o percurso da Ribeira do Marchante, incluindo uma parte que não conhecia. Fiquei horrorizado ao ver quanto Cana está crescendo agora dentro e ao longo do rio. Se continuar assim não haverá água fluindo. A Cana é uma espécie invasora e cria problemas em muitas partes do mundo. É resistente ao fogo porque pode se regenerar, consome muita água, suas raízes penetram profundamente no solo dificultando sua remoção, se espalha rapidamente, cresce muito rapidamente e desloca a vegetação nativa ao mesmo tempo que destrói o habitat da vida selvagem. Quanto aos eucaliptos, há vários anos uma equipa de homens derrubou algumas árvores perto do Estádio Desportivo, que fica perto do rio. Porém, eles abandonaram os tocos e logo depois as árvores voltaram a brotar. O eucalipto se recupera rapidamente quando derrubado, e também se regenera após ser queimado em incêndios florestais. Esta árvore está a causar um grande problema em muitas zonas de Portugal.Além de tudo isso, os caminhos pela mata às margens do rio estão sendo agitados por ciclistas de trilha, pessoas em veículos de quatro rodas, e até encontramos um carro passando pelo leito do rio em um trecho. Tudo isso faz com que a areia desça para o rio durante as tempestades. A minha conclusão é que a Ribeira do Marchante precisa de ajuda, e precisa de ajuda urgentemente ou continuará a diminuir rapidamente e acabará por não passar de uma memória.Sou membro do ESRAG (Grupo de Ação Rotary para Sustentabilidade Ambiental) e este grupo está muito preocupado com a restauração de rios e zonas húmidas. Existe um grupo Adote um Rio.

Também sou um membro ativo do SAVE THE FROGS! uma organização de caridade que, como o próprio nome sugere, se dedica a salvar sapos e outros anfíbios em todo o mundo. Existem subsídios disponíveis do Rotary e da SAVE THE FROGS para financiar o tipo de trabalho que seria necessário para salvar a Ribeira do Marchante. Espero que o dinheiro possa ser encontrado para financiar um projeto de restauração. Penso que algo deveria ser feito para impedir a destruição deste rio antes que seja tarde demais.

Tuesday 14 February 2023

The Magic of Butterflies and Moths is a new Moon Books title

The Magic of Butterflies and Moths is my new book


The Magic of Butterflies and Moths is my latest book published by Moon Books. It will be available on 24 February 2023, but it can be preordered now. As the title suggests I take a look at what can be considered as magical about these amazing insects. Everyone is familiar with the incredible transformation from egg to caterpillar to chrysalis and then to adult butterfly but there are many more astounding facts about butterflies and moths. 

Swallowtail caterpillars

I first became fascinated by these insects when I was a little boy. I used to keep caterpillars in jam jars and other containers. I learned then that you had to feed the larvae with the right types of plants. I also learned that some chrysalises and pupae have a short time before they emerge as adults, while others must wait many months and go right through the winter and the spring months before eclosing in early summer. Many species of butterfly and moth embark on lengthy migrations at specific times of the year. They can fly incredibly long distances and cross seas. The Monarch is probably most famous of all for its annual migration from the lower part of Canada and the most northerly American states right down to Florida, California and Mexico. It overwinters in the south and in the spring it begins the migration northwards. 









Monarch butterfly

I take a look at butterflies that live in the most inhospitable areas where you would probably think these insects cannot be found. But there are butterflies that live within the Arctic circle, in Lapland and Siberia. Some butterflies have extraordinary life cycles. There are species of Blue butterfly that depend on specific species of ants finding their caterpillars. The ants take the caterpillars into their nests where when fully grown the butterfly larvae become chrysalises. The very rare Large Blue is a species that is like this. 

Many species of butterfly and moth employ elaborate camouflage as adults and as caterpillars to help protect them from predators. When their wings are folded some species look like dead leaves as adults, some caterpillars look like twigs. Other types have displays and warning colours of bold contrasting hues that are a signal that says “do not eat me because I will poison you!” There are moth species that cannot feed as adults, there are many others in which the females are not only unable to eat but they cannot fly either. Yet the caterpillars of these species are some of the most gaudy and exotic looking of all. Some moths, such as the weird looking Death’s-head Hawk-moth have become the subject of superstitions. Because it has an odd skull-like marking on its thorax and because it has weird behaviour such as the ability to squeak, this moth was regarded as a bad omen. 









Death's-head Hawkmoth

As well as the appearances and behaviour of many species of butterfly and moth I take a look at what we can do to help them. There is a chapter devoted to butterfly gardening, as well as a list of some organisations where you can find out more about butterfly (and moth) conservation. 

The Magic of Butterflies and Moths has some wonderful endorsements from people such as Rebecca of Rebecca’s Butterfly Farm who said: “Lovely stories and lots of amazing facts.” Paul Hetherington, Buglife Director of Fundraising and Communications described my book like this: “The Magic of Butterflies and Moths is just what is needed to help people understand and have friendlier relationships with these incredible insects, a major goal of our No Insectinction campaign.” 

My book will be available from Amazon.com and Amazon.co.uk as well as many other book suppliers around the world. Just Google “Steve Andrews The Magic of Butterflies and Moths” and pick up your copy. 




Tuesday 13 September 2022

The Death’s-head Hawk-moth must have a very difficult life

The mysterious life of the Death’s-head Hawk-moth

Death’s-head Hawk-moth. Photo: Steve Andrews

The Death’s-head Hawk-moth (Acherontia atropos) is a very remarkable insect in many ways. Once seen it will never be forgotten with its skull-like marking on the back of its thorax, dark but beautifully patterned wings, its massive size, and stout furry banded body. But this hawkmoth must lead a very difficult life, and it doesn’t surprise me that it is rare. The Death’s-head Hawk-moth’s main food is apparently honey and it steals this from beehives. It is even known as the “Bee Robber.” So one of the first things the insect must do in its life is locate a hive, not so easy these days with the terrible decline in honeybees, said to be due to Colony Collapse Disorder. It then has to enter the home of the bees, find the honeycomb and use its short proboscis to break through the wax to steal the sweet liquid.

There are theories about how it manages to do this without being attacked by angry bees. One theory is that it emits a smell that causes the bees to leave it alone because it mimics the scent of the bees. It appears that the moth requires the stimulus of being in a hive to go about feeding. In captivity if supplied with honey on a pad it won’t touch this. Websites with details of caring for the moth say that the only way to feed it is to carefully hold the insect and unroll the proboscis so that it goes into a mixture of honey and water. Although the moths will struggle, it is said that after one or two attempts they will learn to feed this way and will take their food on future days. I cannot confirm this because I have to admit I have given up with my attempts and have released moths in my care. The Death’s-head Hawk-moth also squeaks quite loudly when alarmed, and it is definitely alarmed when held for attempted force feeding. My question is why won’t it feed itself? Otherwise in published literature there is very little information about how the adults feed. In a very few places I have read that they also take tree sap and resin, have been known to puncture fruit, accept rotting fruit,  and even that they take the nectar from a Petunia flower, not the normal way but by breaking into the part of the flower that holds the nectar. I have left a moth with a pad soaked in honey and water, and also with Petunia flowers and the moth ignored all of it. Literature on these moths also maintain that this hawkmoth will not attempt to mate until the males have fed and until a few days have gone by. So even if you have males and females emerging around the same time it is still not easy to get them to mate. You have to find a way to feed them, and need somewhere to keep the insects safely where they do not damage their wings trying to escape. In my experience this moth emerges from its pupa at night and soon after the wings are dried it wants to fly. I have had them eclose in the early hours of the morning. I have read that the moth flies very late at night, and this appears to be correct. Researching the Death’s-head Hawk-moth fails to turn up much information that I haven’t given here. I am wondering whether these moths do feed otherwise but have not been studied well enough for anyone to know how they feed or what on.

  Death’s-head Hawk-moth caterpillar. Photo: Steve Andrews

The caterpillars are another matter though, and the information on them today is far, far greater than when I was a boy. Books on insects many years ago used to say the caterpillar fed on the foliage of the Potato, possibly on the Jasmine too, and that was about it. Nowadays the reported range these huge larvae can eat is very  wide indeed. Besides Potato and Jasmine, it is known to feed on Deadly Nightshade, Woody Nightshade, Snowberry, Thornapple, Tree Tobacco, Tomato, Hemp, Lantana, Olive, Privet, Lilac, Buddleia and Tulip Tree. I have found them on Thornapple in Tenerife and Lantana there. I suspect the caterpillar can also feed on Sea Grape because I encountered a wandering larva once in a shopping precinct where the only vegetation present was on some specimens of this tree. Unlike many species, the caterpillar of the Death’s-head Hawk-moth is almost spoiled for choice. Nevertheless I have found they don’t like to switch plants that they have been eating. Larvae reared on Privet expect more Privet. Besides the unusual feeding habits of the adult moths, I wonder what causes some of them to embark on lengthy migrations, including those in which it flies over the seas. This species has been found as far north as the Shetland Islands in the UK, but clearly could not withstand the winters up there, which would be far too cold. It is said that this species cannot get through winters in Britain elsewhere. What causes it to migrate? How does it decide which direction to fly? How does it find beehives? The Death’s-head Hawk-moth is a very mysterious moth don’t you agree?

Friday 29 April 2022

SAVE THE FROGS DAY 2022 Report from Portugal

 Special report from Quinta do Conde for SAVE THE FROGS Day! 

With my friend, fellow singer-songwriter Ana Lisa Meier, for this year's SAVE THE FROGS Day, we decided to create a report about frogs and wetlands in the Quinta do Conde area of Portugal where we are. Ana is very lucky because she has a colony of Iberian Water Frogs in her garden. They live in, and around, the two garden ponds, which shows how valuable ponds like this are when it comes to amphibian conservation.  Here I am enjoying listening to the frogs and the birds singing.

We went to explore the wetland areas near where we live, took some photos and captured some video footage there. There is an area of wetland behind a sports stadium that depends on a lot of winter and spring rainfall to be of any use to amphibians. This year the rains came very late, after a winter drought, presumably due to the Climate Crisis. The water sadly drains away fast and feeds a river nearby, as well as being absorbed by the sandy ground. I feel this area could be greatly improved as a wetland habitat if some restoration work was done there so that the water was retained longer. 

We went to look at the river, which some years gets nearly dried up, although there are usually some pools left standing. Frogs can be found here and at this time of year you can hear Iberian Water Frogs singing, though they are very difficult to spot. 
 

I once saw a European Pond Tortoise here too. I wasn't able to get a photo because it dived in the water. This species is endangered, so I was pleased to see that at least one was surviving in a wildlife habitat near where I live.  Further along this river there is a bridge and the frogs can be heard loudly there, although we were unable to actually see any. They stop calling when you approach. 
Sadly right by this bridge we encountered some highly polluted water from a drain entering the river. This is really bad because this river feeds an Ecology Park further along its course.  Water pollution is a serious threat to amphibians, fish and other wildlife. 
Back by the stadium and right by a main road are a lot of temporary pools that fill up in winter and spring and are always used by local amphibians. Tadpoles can be seen in the cloudy water but it is always a race against time for them because the pools always dry up, leaving just cracked mud until next rainy season. making the situation worse, people enjoy driving through these pools. I once saw a vehicle stuck in one of them with the mud flying up. I must admit I thought it was funny and had no sympathy for the driver. It was as if this was "Instant karma."
 
Ana and I next went to take a look around the Ecology Park of Quinta do Conde, a place I have written about before in this blog. There is a small lake there and when I last visited, it was full of water and there were plenty of frogs about. Sadly this was not the case this time, though Ana spotted one tadpole. The water was very low and we discovered yet another source of pollution because there was oil floating on the surface at one end of the lake and a trickle of oily water entering it there. Someone had thrown a shopping trolley into the water and a landing stage for visitors to stand on to get a better look over the water had been demolished for some reason. 
 

The Ecology Park was showing neglect and was disappointing, although there are extensive reed beds there, and many other smaller pools and dykes in an area used for allotments that local people grow fruit and vegetables in. Because the water was so low in the lake I thought that Herons and Storks had probably caught a lot of the frogs and any fish that live there. Storks congregate in the fields next to the park, and Herons are also seen here. Storks and Herons, of course, have to find food, and are just as important as frogs. Although our visit to this park was somewhat disappointing, it fitted in with what we were trying to do, which was to conduct an exploration of our neighbourhood, to keep things local. I think it is important for anyone who wants to help with conservation of amphibians and other species of wildlife, to do what you can in the area you live in. This applies wherever you are in the world. If you have found this report interesting and would like to find out more about what you can do to help SAVE THE FROGS, please visit the SAVE THE FROGS website! Now I'm off to help SAVE THE FROGS! 













Friday 18 March 2022

Butterflies flying in March in Portugal

Butterflies flying in March in Portugal

There are many butterfly species currently flying in the area of Portugal I live in. They are enjoying the warm spring sunshine. I saw several Green Hairstreaks (Callophrys rubi), two Clouded Yellows (Colias crocea) , two Red Admirals (Vanessa atalanta),

lots of Speckled Woods (Pararge aegeria aegeria) and several Large Whites (Pieris brassicae) on a short walk today. As well as these butterflies, I spotted two Spanish Festoons (Zerynthia rumina). I live in Quinta do Conde and like to walk through some forest and scrub on my way to the local supermarket and back. I usually see butterflies unless it is very cold, wet or windy. There are plenty of plants the Green Hairstreak butterflies can lay their eggs on here. They have a choice of Gorse (Ulex) or the Rockrose (Cistus) species. I was watching a Clouded Yellow female carefully searching in a short grassy area for Clovers and Medicks that are sprouting after some recent rains. Like all butterflies, the success of a species is very much linked to the distribution of plants they need for their caterpillars, and how well these plants are growing at the right season. Even if the correct plants are available in a given area, heat and drought can shrivel them up or prevent them growing at all. This is a disaster for a female butterfly. Every year we get several months in the summer period when the vegetation mainly goes brown or dies back to the ground. It can even be difficult finding some green blades of grass.

This is a big problem for the butterflies, like the Speckled Wood and Meadow Brown (
Maniola jurtina), that have larvae that feed on grasses. The latter butterfly flies later in the year and does surprisingly well here, though I have seen them sheltering in the shade of trees when it is very hot. I always wonder how they find enough grass to lay their eggs on. For the Speckled Wood in February and March this is not a problem because the grass species grow back after the winter rains. This year there has been a terrible winter drought so the land is very dry. Nevertheless many plants, including grass species, have survived, though they are nowhere near the usual size. I have been especially glad to see the small colony of the Spanish Festoon is still thriving. Last year, I didn’t see any of this species and feared that the brutal cold of the winter of 2020-2021 had wiped them out. I was obviously wrong because I have seen several of this species in the area they are found in here. Speaking of the Spanish Festoon, and its potential problems, it took me years to find the food-plant they are using in my locality. The Spanish Festoon needs any of the species of Birthwort (Aristolochia).
The species that grows here is the Round-leaved Birthwort (
A. rotunda). It is a delicate plant that winds its way amongst bushes and undergrowth so is not that easy to spot, especially in shaded areas. It only grows in one part here, where it is found in a lightly wooded area with a pathway and a bank. I can see for myself how this species is bound to stay where its food-plant grows because every year this location is the only place I can find this spectacular butterfly. I say spectacular because its wings are marked with darker zigzags and red dots on a yellow background. I am a migraine sufferer and the jagged lines remind me of the aura formation many people who get migraines are used to seeing.
Horrible as migraines are, the Spanish Festoon is a truly beautiful species of butterfly.


All photos by Steve Andrews

Tuesday 21 December 2021

Butterflies in December in Portugal

 Butterflies still flying in December

Red Admiral (Photo: Steve Andrews)

Here where I live in Portugal there are still butterflies flying in December. One of the most commonly seen is the Red Admiral (Vanessa atalanta).  The males establish territories they patrol on scrubland, while mated females seek out patches of Annual Nettles (Urtica urens) that grow well at this time of year, due to the late autumn rains. These nettles often grow as weeds in gardens and so the butterflies can often be seen there too. The caterpillars make tents out of the leaves and can be found by looking rolled up leaves at the top of plants. There is a patch of ground where I took the photo above, where I see Red Admirals every year. It is almost as if the same butterfly has returned, as regular as clockwork, but of course, they are new butterflies. This leaves the question of how do they select the same spot each year. It is amongst scrub and pines but there are plenty of similar spaces. 

Small White (Photo: Steve Andrews)

The Small White (Pieris rapae) can often be seen too in December. I presume the Large White (P. brassicae) are still around, though I cannot vouch for this. although at other times in the year they are common. Both species can be seen in urban settings where they fly over parks and gardens in search of cabbages, cauliflowers, kale and broccoli on which their caterpillars can feed unless gardener spots them and removes them. Both species can be found in rural areas too where the females lay their eggs on wild species in the Cress family (Cruciferae). 

Speckled Wood (Photo: Steve Andrews)

There are still a few Speckled Wood butterflies about as well. The subspecies most often seen Portugal is Pararge aegeria aegeria. The speckles on its wings are more of a tawny orange shade than the usual pale yellow markings that contrast with the darker brown. At first sight these Portuguese Speckled Woods closely resemble the Wall Brown (Lasiommata megera), and I must admit I was fooled by this similarity when I first came to Portugal. The Wall Brown has seriously declined in the UK. Both these butterflies use various grass species as food-plants for their caterpillars. Here in Portugal I always wonder what the butterflies that need grass do in the hot part of the year when all the grass has died or become dessicated and brown. They have some means of surviving these times of summer drought. The Meadow Brown (Maniola jurtina) is very common where I live, which is in a town about 25km south of Lisbon. It is not seen in winter but when it does fly in summer I have seen these butterflies sheltering in the shade of clumps of trees. 

Swallowtail caterpillars on Rue (Photo: Steve Andrews)

There are still caterpillars of the Swallowtail (Papilio machaon gorganus) feeding on Rue in gardens, though I haven't seen any adult butterflies since November. The winter chrysalises of this species are a brownish colour, as opposed to the green ones that are produced for the rest of the year. These chrysalises and any still to be produced, will stay sleeping until the spring when the cycle begins again. Speaking of Swallowtail butterflies,  I saw a female of the Southern Scarce Swallowtail (Iphiclides feisthamelii) in the first week of December, despite the cold.  She was inspecting an almond tree on some waste-ground near where I live and laying her eggs on the remaining leaves. Sadly her efforts were in vain because the tree has since shed all its leaves. I went back to see if could spot any caterpillars that had hatched, with the idea that maybe I could keep them indoors and feed from any leaves I could locate on plum, peach or almond that hadn't yet dropped theirs. There were no leaves and no caterpillars. This female butterfly was out too late in the year here.  Many species are being affected by climate change and are doing what they can to adapt to the ever changing conditions we are experiencing. Next month is usually the coldest month of winter in Portugal and we get hard frosts then so I am not expecting to see any January butterflies but these days you never know! 


Saturday 18 April 2020

Habitat Destruction and the European Rabbit

The European Rabbit is in Danger!
European Rabbit (Photo: Steve Andrews)

There’s a strip of woodland and scrub five minutes from where I live, and nearly every day I connect with nature by walking through it. Although it has busy roads separating it from larger sections of the Portuguese countryside, and is near to houses, this parcel of land has a wonderful selection of wildflowers and of wildlife, including butterflies, birds, reptiles, and a colony of European Rabbits. At least, there was a rabbit warren there until recently. I have been watching an example of habitat destruction on my doorstep! A team of workmen, bulldozers and JCBs have ruined where the rabbits live, transforming it into something neat and tidy, a place that shows the human view of how things should be. It is no longer a world and a home for European Rabbits, at least I have not seen any since the men were there. Of course, I never could get close to any of the rabbits I would see on happier days, but just knowing they were there gave me a good feeling. A sense of contentment that all was well in a parcel of countryside, right by where I live. The sandy soil in this location is ideal for a rabbit to burrow in and trees and bushes, brambles and other vegetation, provide a place to hide away from walkers with dogs. The European Rabbit has many threats to its life to watch out for: natural predators and humans who hunt. Rabbit hunting is a tradition in many places. Men with guns and dogs get pleasure from this. These hunters would argue that it is a traditional way of providing food for their families and meat for the market. It is a serious threat to rabbit populations though, especially coupled with the devastating effects of the deadly Myxomatosis plague that was unleashed many years ago. The Rabbit Calcivirus has also contributed to the decline of this once very common mammal, which the International Union For Conservation Of Nature (IUCN) in 2018 classified as Endangered for the animal’s current Conservation Status. In Portugal, the Iberian Lynx, a species that is struggling for survival as well, depends on rabbit populations, because these once common mammals are its main prey. Efforts to help the Lynx return are doomed to failure unless rabbit numbers can be increased a lot as well. One form of life depends on another, as links in a food chain, and parts of the web of life.
After the work was done! (Photo: Steve Andrews)
But getting back to what has happened in the woodland near my home: over a period of about 10 days, the workmen levelled a large area of mixed grassland and scrub, they chopped down some pine and willow trees, cut down bushes, drastically thinned out and pruned back any clumps of saplings, and then bulldozed right through where the rabbits had their burrows, which was in a wooded area at the bottom of a slope. The men have constructed a wide channel here that runs in the direction of one of the bordering roads. I thought maybe they were going to lay a large pipeline of some description but this didn’t happen and they have ceased work. Perhaps the channel is intended as somewhere water can run because it does follow on from a stream higher up in the woodland.
They cleaned this part up too! (Photo: Steve Andrews)
Perhaps it is intended as a flood defence? As for the destruction of trees and bushes, that was probably land clearance as a defence against wildfires, which are now a serious threat in Portugal. Now the men have all gone and I am left wondering, is this because they completed their work or have they been laid off due to the ongoing CoronaVirus lockdown at time of writing? Whatever the answer is, it appears the rabbits have gone too. Did they manage to escape? Did they run away in time? If so, where have they gone? What does a European Rabbit do when evicted from its home? If they did escape they have been subjected to a terrifying experience for the whole colony. My daily pleasure of seeing rabbits has gone. Now when I walk in this bit of countryside I am on the lookout for signs the rabbits have survived. I am looking for new burrows, I am looking for piles of rabbit poo on paths, but so far I have seen none. It leaves me feeling sad and is yet one more example of habitat destruction I have witnessed. There have been many throughout my life, from ponds that are drained to become flowerbeds or levelled ground, to meadows that become housing developments.  Now here in Portugal, I feel like I have been watching a real-life chapter from Watership Down!

Sunday 23 February 2020

Natterjack Toads are very rare in the UK but breed in pools at the side of the road in Portugal

Natterjacks like temporary pools and puddles
Natterjack Toad (Photo by Bernard DUPONT)

The Natterjack Toad (Epidalea calamita) is one of the rarest amphibians in the UK and only found in several scattered colonies in coastal areas in England, Scotland and one in Wales where it has been reintroduced. It is the only native species of toad in Ireland where it lives in a few locations. In many parts of Europe, however, it is far more widely distributed, and in Portugal it even breeds in temporary pools and puddles at the side of the road near where I live.
Roadside pool (Photo by Steve Andrews)
Pool with tadpoles (Photo by Steve Andrews)
Unlike the Common Toad (Bufo bufo), which likes large ponds and lakes, the Natterjack uses pools that are likely to dry up later in the year. This is a great danger for its tadpoles because the water may all evaporate before they have grown big enough to become toadlets and to leave. Many tadpoles perish when the pools become no more than cracked mud. Lucky ones will be in pools with deeper water that takes longer before it has all gone. There is an advantage to this seemingly reckless breeding behaviour though, because the pools the Natterjack chooses have no predators, such as newts and dragonfly nymphs in them. The Natterjack actually favours pools that do not even have any vegetation, and are just a few inches of water covering sand or mud. Somehow they manage to find enough to eat in these conditions.
Natterjack Toad Tadpoles (Photo by Steve Andrews)
The tadpoles are much smaller than Common Toad tadpoles too and they can complete their metamorphosis in as short a time as six weeks. It is a race against time when warm weather dries up the water they depend on. Last year, where I live, this species was unlucky because drought set in with hot sunny weather and all the pools dried up totally. I had moved some of the tadpoles to pools with more water but even my effort to help them was in vain because none of tadpoles had even developed their back legs when all the water was evaporated in the heat. This year, I am hoping that some, at least, will survive. We have had a lot or rain earlier on and the temporary pools where I find tadpoles of this species currently still have plenty of water, although it is starting to go down. In the UK, the Natterjack is mainly found in coastal locations where temporary ponds form in dunes and sandy areas by the sea, on the continent and Portugal, however, it is also found inland. The male Natterjack attracts others of his kind to a suitable stretch of water with a loud and rasping call but only does this at night. By day, these toads hide in burrows in the sand, and they favour sandy locations, such as dunes and heathland.
The Natterjack can be recognised because it has a yellow stripe down the middle of its back. It cannot jump well and tends to walk fast, which has led to it also being known as the “Running Toad.” When I was a boy I always dreamed of finding a Natterjack Toad but never did. It was very rare all those years ago too. I am amazed to find this very rare amphibian breeding in muddy pools by a main road near where I live.

Wednesday 19 February 2020

Searching for Birthwort with the Spanish Festoon Butterfly

Searching for Birthwort with the Spanish Festoon Butterfly

Spanish Festoon (Photo: Steve Andrews)
The Spanish Festoon (Zerynthia rumina) is a very pretty butterfly in the Papilionidae or Swallowtail butterfly family. It has strikingly patterned wings of yellow, red and dark brown with zig-zag markings on its hindwings. It is found in Spain, Portugal, North Africa and southern France. I have seen the butterflies in scrubland and pine and oak forest near where I live, but until today I have never seen any of the Birthwort species (Aristolochia spp) this butterfly uses as food-plants for their caterpillars.

I have lived in Quinta do Conde in Portugal for the last five years but have never managed to find any type of Birthwort growing here so it has been a real mystery for me, as to how these butterflies survive here. Today after a lot of searching, I discovered a clump of Round-leaved Birthwort (A. rotunda) growing amongst trees and heather at the top of a bank.
Spanish Festoon habitat (Photo: Steve Andrews)

I had to climb up to find it, and this is why I had never seen it before, although I often walk through this part of the woodland. A female Spanish Festoon has to find this plant or other Birthwort species on which to lay her eggs. There are no other options. The distribution of the food-plants, as is the case with most butterflies and moths, is one of the main factors responsible for the distribution of these insects. In fact, if you find a colony of a particular butterfly or moth, you can be fairly certain that the plants the larvae of that specific species need will be growing nearby. 
Round-leaved Birthwort (Photo: Steve Andrews)

The Spanish Festoon is flying very early this year. Most sources say that it can be seen from April onward, although the excellent Collins Butterfly Guide, which says this butterfly flies from late March to May, also points out that it has been recorded in February. With the Climate Crisis making the weather a lot warmer, and leading to droughts and the very real danger of forest fires in Portugal, butterflies and other species of flora and fauna are directly affected by changes in the weather. 
The Birthwort species are poisonous plants that are dangerous for humans to consume, because poisoning from these plants can lead to kidney failure. These plants were once used to cause uterine contractions, hence the name “birthwort,” but their usage as a medicinal herb has mainly been abandoned due to the dangers of the toxins these plants contain. For the caterpillars of the Spanish Festoon, as is the case with the larvae of many butterflies that have poisonous food-plants, the poisons in the plant become a form of defence for the caterpillars. Because they become toxic too, any predators that try eating them are likely to get very sick. The European Birthwort (A. clematitis) is the species I was expecting to find, so I was pleasantly surprised to find the Round-leaved Birthwort was the local species. Birthworts tend to be straggling plants that need other vegetation or support to climb over. The Aristolochia species have unusual tube-shaped or pipe-shaped flowers, and one species, the Dutchman’s Pipe, which has very large and attractive blooms, is grown for ornamental purposes.

Sunday 16 February 2020

The Angel of Death

The Angel of Death
Angel of Death (Azrael) by Evelyn De Morgan (Public Domain)
It was in the not too distant future when the nightmare scenario devastated the western world, and led to the final collapse of life as we know it. A 100% lethal mutated virus had been spawned in the labs of insane scientists. There was no known cure for the Angel of Death, which spread by contact, as well as via the air and in water supplies. An even more insane subversive group within the ranks of the the evil germ-warfare-mongers had infiltrated to the highest echelons above top secret, and in a final doomsday effort had unleashed the killer virus upon an unsuspecting world. Death came to everyone infected with it within weeks, and there were no recorded cases of survival. 
Throughout the entire civilised world, throughout all the teeming cities, and even to the smaller towns and villages of the whole globe, the silence of the fatal germ had come. Only humans were infected, so once again the world of animals and plants had a chance, for it appeared that the reign of mankind was finally over for good.
Ten years had elapsed and the passage of time had brought many changes. In once Great Britain, the cities with all their accompanying industrial and urban sprawl had reverted back to a more natural environment that was gradually and not so gradually displacing what humans had created. Rooftop gardens of small trees, brambles, briars, and assorted weeds and grasses greeted the sky, and the hungry flocks of sparrows, starlings, pigeons and finches. Barn owls bred again in large numbers and circled the dark night skies, seeking out their choice from the teeming rodent hordes that had multiplied without check feeding on the vast quantities of stored foods in shops and warehouses.
Branches of trees poked skywards through crumbling and ruined buildings. Roads, streets, pedestrian precincts, shopping malls, and even the once mighty motorways lay cracked by the ever-advancing frontline troops of armies of the vegetable kingdom.  Grass grew waist-high in fields, parks and open spaces, and masses of wildflowers adorned these meadows providing a feast for the butterflies, bees and other pollinators. Mongrel dogs prowled and hunted in packs. Hawks and other birds of prey had a field day with all the vast numbers of small birds, and rats and mice, now to be hunted.
The seas and lakes, rivers, streams, ponds, and other waterways and wetlands had once again come into their own and teamed with fish and other aquatic life, which in turn supported huge breeding colonies of waders, herons, ducks, and other water birds. Massive patches of brambles, nettles, briars and assorted scrub in sprawling growth reclaimed the once cultivated and civilized land. Broken human skeletons lay covered or partially exposed to the elements, or rotting away in the empty rooms where they fell. Forests too were starting to reclaim the land in an effort to return to days gone by.  Foreign flora and fauna vied with natives for space in the battle for survival under the laws of Mother Nature.
In the rest of the world, the picture was much the same, and the land so devastated by mankind’s short and tyrannical reign of destruction was being fast taken back by natural forces as the balance became again restored to the Earth.
The end of mankind had not, however, arrived for small pockets of survivors continued to live in their ancient tribal ways in the mountains and jungles of South America, Asia, and deep in the rainforests of Africa. These tribes had survived, because although they were aware of the civilised world they had chosen to live in isolation from it, shunning all contact, and so preserving their ancient culture and traditions.
So the planet was once more open for colonization as those tribal peoples grew in numbers, and an almost Garden of Eden type situation presented itself with the ruined technological cities and factories of destruction still there to maybe be discovered like the fruit of the tree of knowledge of good and evil. 
Only the tribal elders really understood the dangers that lay ahead, but as to whether they were able to prevent enquiring minds from prying into these secrets only time would tell. If the circle was to run its course, several thousand years more had to elapse, but for the time being all was well upon the Garden of Earth.

Footnote: I wrote this depressing story many years ago but had not done anything with it until now. I am hoping it remains just a story! With the Corona Virus or Covid 19 virus in the news, it seemed a good time to publish it though.