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. 

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?

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

Helping the Red Admiral Butterflies

Red Admirals need Nettles

Red Admiral Photo: Steve Andrews

The Red Admiral (Vanessa atalanta) is a very pretty butterfly you are probably familiar with. You can’t miss it with its striking red, black and white wings, and in the UK, it is one of the last butterflies to be seen in late autumn. We all love to see butterflies but many people don’t realise how important the plants the caterpillars need to feed on are. In the case of the Red Admiral, the main food-plants are Nettle species. The Stinging Nettle (Urtica dioica) is the most commonly used plant but here in Portugal where I live, the Annual Nettle (U. urens) is the species they use.

Annual Nettles Photo: Steve Andrews

These nettles spring up as a garden weed and on waste ground in the autumn and winter when rains fall. Sadly because they are regarded as a weed, many people destroy them, either manually with care, due to the stinging threat from the plant, or with herbicide, and any Red Admiral eggs, caterpillars or chrysalises, get destroyed too. I saw a large patch of Small Nettles growing on some rough ground in a shortcut between two roads in my neighbourhood. I checked for Red Admiral caterpillars and soon found some, which I took into care, just in case anyone came along and killed the plants. I am very glad I did because some council workers turned up and removed all the vegetation that was growing there.

There is a skill to finding Red Admiral caterpillars, but it is very easy to learn. The caterpillars are usually found towards the top of a nettle stem and they fold leaves around themselves as shelters. The leaves are held with a small amount of caterpillar silk. They eat surrounding leaves and you can spot the holes in these leaves and their ragged appearance where they have been eaten away.

Sometimes the Red Admiral caterpillar will pupate inside their shelters too, but not always, because they will also transform into chrysalises that hang suspended from nettle stalks or possibly on a wall, fence or other object near where the caterpillar has been feeding. I keep the caterpillars in sandwich boxes with a paper towel on the bottom to help absorb any dampness and to make it easier when cleaning out the container and providing new food. Often I find that the caterpillars will choose to pupate after spinning a pad of silk on the plastic top of the sandwich box. The chrysalises are brown but some are speckled with gold. As the butterfly inside becomes more developed and nears the time for emergence it becomes much darker and you can see the wings colouring up in the wing-case on each side of the chrysalis.

When the Red Admirals finally emerge, or eclose, as lepidopterists would say, they need to dry their wings thoroughly before they take their first flight. It is very important at this stage that they are not disturbed and that they don’t fall off whatever they are clinging to. This can be a problem for all species of butterflies at this stage of their life-cycles. Fallen butterflies can become cripples if they fail to expand and dry their wings properly. Usually all goes well, though, and the Red Admiral is all set to fly away. This butterfly can fly a long way. Many of those seen in the UK are migrants, though this species can hibernate in Britain too. In Portugal they have more than one generation but need nettles. I usually see them in autumn, winter and spring. In summer it is too hot and dry. There is a place in some woodland near where I live that I can almost guarantee I will be able to find a male Red Admiral every year in the right seasons. Of course, it isn’t the same butterfly but is obviously an ideal spot for a male of this species to create a territory he can patrol.

All photos by Steve Andrews