Archive for the ‘Entomology’ Category

restless-creatures-by-matt-wilkinsonRestless Creatures: The Story of Life in Ten Movements, Matt Wilkinson (Icon 2016)

A fascinating book about a fascinating thing: the movement of plants and animals. It’s also a very familiar thing, but it’s far more complex than we often realize. Human beings have been watching horses gallop for thousands of years, but until the nineteenth century no-one was sure what was happening:

The man usually credited for ushering in the modern study of locomotion is the brilliant photographer Eadweard Muybridge. […] His locomotory calling came in 1872, when railroad tycoon and former California governor Leland Stanford invited him to his stock farm in Palo Alto, supposedly to settle a $25,000 bet that a horse periodically becomes airborne when galloping. (ch. 1, “Just Put One Foot in Front of Another”, pg. 16)

To answer the question, Muybridge used a series of still cameras triggered by trip-wires. And yes, galloping horses do become airborne: “not when the legs were at full stretch, as many had supposed, but when the forelimbs and hindlimbs were at their closest approach.” However, Matt Wilkinson calls another man “the true founding father of the science of locomotion”: the French scientist Étienne-Jules Marey, who had been investigating movement using a stylograph. In fact, it was Marey who first proved that galloping horses become airborne (ch. 1, pg. 19). Muybridge’s photographs were dramatic confirmation and the two men began to collaborate.

Marey also pioneered electromyography, or the recording of the electrical impulses generated by moving muscles. Like the rest of modern science, biokinesiology, as the study of animal movement might be called, depends on instruments that supplement or enhance our fallible senses. It also depends on mathematics: there is a lot of physics in this book. You can’t understand walking, flying or swimming without it. Walking is the most mundane, but also in some ways the most interesting, at least in its human form. Bipedalism isn’t an everyday word, but it’s an everyday sight.

What does it involve? How did it evolve? And how important was it in making us human? Wilkinson looks at all these questions and you’ll suddenly start seeing your legs and feet in a different way. What wonders of bioengineering they are! And what a lot of things happen in the simple process of “just putting one foot in front of another”. Scientists still don’t understand these things properly: for example, they can’t say whether or not sport shoes are dangerous, “lulling us into a false sense of security, causing us to pass dreadful shocks up our legs and spine without our being aware of them” (ch. 1, pg. 29).

But there’s much more here than horse and human locomotion: Wilkinson discusses everything from eels, whales, pterodactyls, bats and cheetahs to amoebas, annelid worms, fruit-flies, zombified ants and the “gliding seed of the Javan cucumber Alsomitra macrocarpa”. He also discusses the nervous systems, genes and evolution behind all those different kinds of movement. This book is both fascinating and fun, but I have one criticism: its prose doesn’t always move as lightly and gracefully as some of its subjects do. Wilkinson mentions both Stephen Jay Gould and Richard Dawkins. I wish he’d written more like the latter and less like the former. If he had, a good book would have become even better.

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british-butterflies-by-david-dunbarBritish Butterflies: A History in Books, David Dunbar (The British Library 2012)

This isn’t a book about British butterflies, but a book about books about British butterflies. There have been a lot of them and David Dunbar does a good job of providing a comprehensive guide for collectors. He begins with the Insectorum sive Minimorum Animalium Theatrum (1634), the Theatre of Insects or Tiny Animals, which is based on a manuscript by Thomas Moffet. Was Moffet the father of Miss Muffet of nursery-rhyme fame? Maybe. He was certainly a pioneer of British entomology and “the original Latin edition of Insectorum Theatrum must be regarded as the cornerstone of any collection of early entomological books”.

If you want that cornerstone, you’ll have to be rich: it was listed for £4,141.72 at Abe Books in 2016. I would be happy with a facsimile myself. I used to own a facsimile of perhaps the most famous book discussed here: Moses Harris’s The Aurelian (1766). Dunbar discusses the original, mentions the facsimile, and reproduces some of Harris’s beautiful illustrations showing butterflies and moths with their food plants. He explains the book’s puzzling title too: “Aurelian” is an old word for a lepidopterist and comes from Latin aurum, “gold”, referring to gold spots or colours on a chrysalis (from Greek khrysos, “gold”). The metamorphosis of lepidoptera from ugly or strange larva to inert chrysalis to light-winged adult is a large part of their appeal. Lepidoptera can be like flying flowers and have attracted artists for millennia.

For example, Hieronymus Bosch gave “the wings of meadow browns and small tortoiseshells” to demons in his painting The Garden of Earthly Delights (c. 1490). There’s nothing as strange as that here, but there are a lot of illustrations: almost every page has something attractive or interesting to look at, as Dunbar traces butterfly books from the seventeenth century to the twenty-first. He discusses artists like F.W. Frohawk (1861-1946) and scientists like E.B. Ford (1901-88), but he concentrates on bibliography, not biography. You’ll have to look elsewhere to learn that butterfly-fanciers have a lot in common with orchid-fanciers: they can be strange and obsessive people.

But then butterflies are Ballardian: they combine beauty with strangeness. On page 111 you’ll find the beauty in the colours and patterns of the Large Heath buttery; on page 110 you’ll find the strangeness in a series of “line drawings of butterfly genitalia” from The Genitalia of the British Rhopalocera and Larger Moths (1941).

The genitalia look like spiky seed-pods or torture instruments for aliens. They are still best represented as line drawings, but photography has gradually begun to dominate butterfly books, as you’ll see here. I prefer paintings and drawings myself. There’s a magic to art that resonates with the magic of butterflies, and true art has survived better in natural history illustration than it has in many other places. And Dunbar even has space to discuss butterflies on cigarette cards and wall-charts. He knows his subject inside out and this book about butterfly books proves it.

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A Sting in the Tale by Dave GoulsonA Sting in the Tale, Dave Goulson (Jonathan Cape 2013)

I was looking forward to this book a lot after reading A Buzz in the Meadow (2014), which is the follow-up. I was disappointed. It’s a good book, but it suffered by comparison, seeming scrappier and less well-written than Buzz. And perhaps I was comparing it with Gerald Durrell’s books too, because Goulson starts by describing his childhood as a budding naturalist. He kept birds, amphibians and reptiles, collected insects and birds’-eggs, and dabbled in taxidermy. Like Durrell, he had a lot of failures and made a lot of mistakes, but that was part of learning his future profession.

By the time he was grown-up and a proper biologist, he’d discovered his main interest: bumblebees, which are the chief subject of this book. If you’re interested in them too, A Sting in the Tale will be a good introduction to their fascinating world. They illuminate many areas of biology, from genetics to parasitism, and they’re important to human beings not just agriculturally but aesthetically too. The sound and sight of bumblebees are a wonderful part of summer. It would be a poorer and less interesting world without them, and it’s sad that some species are declining or have disappeared in the British Isles.

Goulson is fighting to re-buzz Britain. He describes how he set up the Bumblebee Conservation Trust and how he’s trying to re-introduce the short-haired bumblebee, Bombus subterraneus, to Dungeness Nature Reserve in Kent. There’s still a thriving natural population in Sweden and a thriving introduced one in New Zealand, which was founded when British bees were taken there in the nineteenth century to pollinate clover. So should the re-introduction to Britain be from Sweden or New Zealand? Goulson thought that there would be “a beautiful symmetry to the idea of bringing back these bees to the UK from the other side of the world after a 126-year absence” (ch. 17, “Return of the Queen”, pg. 236). But the New Zealand bees are highly inbred and seem to descend from just two introduced queens (pg. 234).

So Swedish bumblebees were used in the end. The re-introduction is still under way and some of the questions it raises haven’t been answered. Why are short-haired bumblebees still thriving in Sweden when they’ve declined elsewhere in Europe? And why hasn’t that genetic bottleneck harmed them in New Zealand? Goulson suggests possible reasons, but bumblebees will be baffling biologists for a long time to come. They’re hard to track on the wing and to find when they’re inside their nests, which is why chapter eight is about “bumblebee sniffer dogs”. It turned out that the dog-handler was better at finding nests than the dogs were (pp. 105-6). Experiments often go awry and hypotheses are often confounded. Like A Buzz in the Meadow, this book gives you a good idea of what it’s like to be a working scientist: it’s always fascinating, but often frustrating too.

Both books also lament the depredations of modern agriculture. And of modern horticulture: “bedding-plants have been intensively selected for size and colour, and in so doing they have lost their nectar, or become grossly misshapen or oversized so that it is impossible for bees to get to the rewards” (ch. 16, “A Charity Just for Bumblebees”, pg. 222). This means that “old-fashioned cottage garden perennials” are best: a “wildlife-friendly garden does not have to be a chaotic mass of nettles and brambles”. In the previous chapter, “Chez les Bourdons” (“At Home with the Bumblebees”), Goulson describes his attempt to establish a wildlife-friendly farm in France. That’s the tale he picks up in A Buzz in the Meadow, which uses the farm to discuss a wider variety of animals and plants than this book does.

Perhaps if I’d read the two books in the order he wrote them, I’d have enjoyed A Sting in the Tale more. As it is, the chapter I enjoyed most was “Chez les Bourdons”, which also supplied the most memorable – and gruesome – image in the book. Goulson says that kestrels catch and eat stag-beetles on warm summer evenings at his farm. But they discard the beetles’ heads, which “remain alive for a day or two, their antennae twitching and their great jaws slowly opening and closing” (pg. 203). Nature can be cruel and ugly as well as beautiful. But perhaps insects don’t suffer in any genuine sense. That’s one of the questions that biology is still to answer. In the meantime, Dave Goulson is doing a good job of explaining his science to the general reader.

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19186368.jpgA Buzz in the Meadow, Dave Goulson (Jonathan Cape 2014)

A book that is both a rhapsody and a threnody: Dave Goulson celebrates nature and laments what we’re losing of it. This is what he says in the preface:

In 2003 I bought a derelict farm deep in the heart of rural France, together with thirteen hectares of surrounding meadow. My aim was to create a wildlife sanctuary, a place where butterflies, dragonflies, voles and newts could thrive, free from the pressures of modern agriculture. In particular I was keen to create a space for my beloved bumblebees, creatures I have spent the last twenty years studying and attempting to conserve. (pg. ix)

Bumblebees were the subject of his previous book, A Sting in the Tale (2013). I haven’t read that, but if it’s half as good as this I will certainly enjoy it. Perhaps it’s better: Goulson is a biologist who can both educate and entertain. Expect the unexpected here: he writes about bumblebees and wild-flowers with the same enthusiasm as he writes about cheese and wine.

He’s also good at using the particular to illustrate the general. You’ll learn a lot about science and the scientific method here, from the “robotic beetle drum” he used to study death-watch beetles to the creation of “mathematical models” for predicting outbreaks of flies at a landfill site. Biology is full of puzzles and solving one often creates another. Not that they are always easy to solve: failure and frustration are part of science too and Goulson is happy to admit his own.

But he isn’t happy about the loss of wild habitats and the quickening pace of extinctions. Homo sapiens could also be called Homo exterminans:

New Zealand was colonised much more recently, about 1,000 years ago. As there were no mammals apart from bats, giant birds evolved there, including at least eleven species of moa, the largest of which stood 3.6 metres high, the tallest bird ever to live. They must have been terribly easy to track and kill, for carbon-dating of Maori middens suggests that all eleven species were driven to extinction within just 100 years of man’s arrival. (ch. 15, pg. 242; his emphasis)

It’s a long way from French meadows to Maori middens, as the crow flies, but similar themes apply: humans have exercised power over nature without proper thought for the consequences. Science is giving us more power all the time, but will it kill us or cure us? Dave Goulson is a scientist who increases my hope of the latter.

He also links apparently disparate parts of biology: parasites are part of both botany and entomology. Yellow rattle is a hemi-parasitic plant that exploits grasses and the bumblebees that visit it are parasitized by mites. The world is a web in more ways than one and many aspects of the web are described in this happy, hopeful and highly enjoyable book.

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Guide to Garden Wildlife by Richard LewingtonGuide to Garden Wildlife, Richard Lewington (British Wildlife Publishing 2008)

Richard Lewington illustrated the excellent Field Guide to the Dragonflies of Britain and Europe (2006). Here he’s both illustrator and author, describing and depicting the many species of mammal, reptile, bird, insect, arachnid and mollusc that can be found in a British garden. But that list isn’t exhaustive: millipedes and centipedes aren’t insects or arachnids:

Luminous Centipede Geophilus carpophagus

Dark and sombrely marked, this centipede is sometimes known as the “glow worm” as it gives off phosphorescent light at night. Found under loose bark and fallen logs, and in damp sheds and buildings. Widespread, it appears to be essentially coastal in northern England and Scotland. (“Chilopoda”, pg. 164)

Centipedes are strange animals. Luminous ones are even stranger. But glowing-in-the-dark isn’t the greatest feat of Geophilus carpophagus. Like all other centipedes, it has to solve complex biomechanical problems with an exigent allocation of neurons. As Lewington notes, centipedes are elusive, fast-moving and predatory. But they have flexible bodies that are never in the same orientation twice. Some very interesting algorithms must be at work in their brains and bodies.

In a more general sense, that’s true of every page in the guide proper, with Lewington’s drawings of beautiful or bizarre animals facing potted summaries of their behaviour and habitats. Evolution is a kind of algorithm and every species in this book, from the sparrowhawk, Accipiter nisus, on page 49 to the horse leech, Haemopis sanguisuga, on page 195, has a common ancestor. So evolution is the greatest artist of all, working with matter and energy to create millions of variations on that common ancestral theme.

But the human brain is also a product of evolution, so this book is actually part of nature. That would be true even if it used photographs, but I prefer illustrations. Photography is literally “writing with light”, but a camera is a mindless mechanism. Richard Lewington understands light and had to struggle as he learnt how to capture it on paper. By drawing nature, you acquire a deeper understanding of the richness and complexity of nature. When you draw as well as Richard Lewington and his brother Ian, who supplied the bird illustrations here, you can initiate the unartistic and bring them at least across the threshold of nature’s temple. There’s something magical and ritualistic in illustration that isn’t found in photography and a book like this is as much as an aesthetic experience as an intellectual one.

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Butterflies and Moths in Britain and Europeby David CarterButterflies and Moths in Britain and Europe, David Carter, designed by Roger Phillips (Pan 1982)

I like all the lepidoptera, but the butterflies in this book seem drab and uninspiring set against the moths, which are astonishing creatures visually, behaviourally and evolutionarily. Butterflies receive much more attention and they aren’t often presented beside their smaller relatives as they are here. In the tropics, they would meet the challenge better. In northern Europe, they’re second-best. Northern moths come in a huge variety of gorgeous patterns and shapes, but their beauty and interest suffer more when they’re dead and pinned in an entomological cabinet.

Comparing the dead specimens with the photographs from life, you can see that there’s an elegant self-sufficiency about a moth at rest. Many of them look like crosses between priests and dandies wearing richly embroidered cloaks, sometimes trimmed with fur, and either drawn close to the body or stretched wide in deltas and vees. Even their antennæ could be ritual hats and tiaras. But it’s hard to generalize about such a vast collection of genera and species and some moths look like clowns instead: the scarlet-and-black or yellow-and-black arctiids, whose colors warn predators off.

Their sounds warn predators off too. Bats don’t hunt by sight, so night-flying arctiids generate high-pitched sounds to advertise their inedibility. But just as some harmless moths have evolved to look like wasps, shedding scales on their first flight to leave suitably transparent patches on their wings, so some have evolved to sound like the arctids: there are sonic mimics as well as visual ones. Elsewhere evolution hasn’t added but subtracted: some female moths don’t have wings at all. The females of some species sit and wait for mates and look more like spiders than insects. One of my favourite moths, on the other hand, has multiplied its wings: the pure white Pterophorus pentadactyla, or large white plume moth, looks much the same when pinned to a collector’s board as it does resting on a leaf, because it holds its quintuply-split, silkily-fringed wings “at right angles to the body and folds its legs backwards so that it looks like a letter T.”

Other moths carry letters on their wings rather than in their postures: the wings of the silver y, or Autographa gamma, say something in both English and Greek, as its common and scientific names denote, but I can’t work out which “Hebrew character” the moth of that name is supposed to carry. Its scientific name, Orthosia gothica, isn’t any help. On the other hand, the Mother Shipton, or Callistege mi, really does seem to have two long-nosed, long-jawed crones looking at each other on left and right wings: Mother Shipton was a “famous Yorkshire witch”.

This species reminds me of the contrast between the beauty of moths and their very ugly and alien larvæ and pupæ, some of which can also generate sounds to warn off predators. Aesthetically and intellectually moths are worth investigating, and this book is an excellent place to start. It’s not only well-designed, well-written, and with some very beautiful photographs, it has a separate food-plant index too, running from Abies, or “fir”, to Vitis, or “vine”.

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