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Nature

Summer Chafer

The summer chafer, Amphimallon solstitialis, is a hairy beetle:

I’d never heard of this species before, but I saw one on Wandsworth Common yesterday and looked it up. Not quite as exciting as its friends the cockchafer and rose chafer, but still one of the more interesting beetles I’ve seen in the UK.

Incidentally, Wikipedia tells me that the cockchafer, quite an amusing name in itself, is ‘colloquially called may bug, billy witch, or spang beetle’. Spang beetle is particularly fine.

» The picture is Hugo the Summer Chafer, posted to Flickr by HaPe_Gera and used under a CC attribution licence.
Categories
Nature

Dancing flies

Flies doing a little mating dance on our lily pads. I think they might be a species called Poecilobothrus nobilitatus, but that’s a provisional ID for the moment. Sorry for the camera-shake.

Categories
Nature

Butterfly update

Butterfly Conservation are holding an organised Painted Lady count this Saturday when they’re asking people to count passing butterflies for two hours and post their sightings online. It’s an exciting aspect of the internet that it allows this kind of rapidly organised exercise in citizen science.

Anyway, I thought I’d do a little preliminary count of my own at lunchtime and just counted PLs in the half hour between 12.30 and 1.00. The result: 36. Slightly over one a minute.

What’s interesting is that on the one hand, that’s a staggering number, when you extrapolate out over the whole country: butterflies going past at the rate of one a minute for days at a time over the whole of England (the whole of Northern Europe, possibly). And yet if you weren’t paying attention, it would be possible to be out in the garden and not even notice that this huge natural phenomenon was going on.

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Nature

Ladies, stags and owls

Last week — last Thursday, I think? — I was walking along the road and saw a butterfly go past which I thought was maybe a Painted Lady. Not actually my first of the year, because I’d only recently returned from Provence where I saw *thousands* of ’em, but still quite pleasing because they’re a migrant species resident in North Africa, and while they are not actually a rarity in Britain — some turn up every year — they’re not especially common either.

Then the next day there were a few in the garden, and mentions of them started popping up on the blogs and Twitter feeds of the handful of British natural history bloggers and twitterers I follow. And so I started thinking maybe this was going to be one of those years, when all the conditions come together and they are suddenly all over the place. Something that became very clear when I saw this tweet from @SallyCourt on Sunday:

An incredible sight at Strumpshaw Fen today with hundreds, probably thousands of Painted Ladies flying west. Also Swallowtails + H Dragonfly

In fact over the past week we’ve been in the middle of a massive movement of painted ladies across the whole country. Apparently it’s because they had good weather for thistles in Morocco over the winter. It probably isn’t a coincidence that I saw quite so many of them in Provence; I didn’t think that much of it at the time, since they’re a more common species in the Mediterranean, but there were an awful lot there. Maybe some of them were the same ones that are now fluttering across England.

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It hasn’t been particularly obvious that they’ve been migrating in my garden; there are a few flowers they like and so I’ve been seeing them fluttering back and forth, in no apparent hurry to get anywhere. But while it might appear to be the same three butterflies going round and round in circles, I guess it has probably been a whole sequence of new ones.

Today, after a couple of days of rain when I guess all the butterflies have been sensibly laying low, I saw one fly past outside the window, so I went along to the local park. And sure enough, there they were. Not in their thousands, but a regular stream of them passing through, looking much more determined, flying more or less straight by, heading about NNW. One every few minutes rather than one every few seconds, but once you knew what you were looking for, it was still quite striking.

Here’s an intriguing snippet about painted ladies from my butterfly guide:

Reported occasionally from Iceland, which has no indigenous butterflies.

I bet a few will make it to Iceland this year.

So that was good. My other good local sighting was this (apologies for the rubbishy iPhone photo):

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That’s a Stag Beetle. There are many species of stag beetle worldwide, so to be exact it’s Lucanus cervus, but in the UK it’s just Stag Beetle because we only have the one species with proper antlers. There is also, to be pedantic, the lesser stag beetle, but that’s much less interesting.

South London isn’t exactly a wildlife stronghold for many species, but stag beetles are increasingly rare nationally and doing pretty well around here, so it’s good to see one. It’s also good to see them because they are just fabulous little beasties.

While I’m on insects, a few things from Provence. We saw lots of butterflies, most of then just too hard (or too much work) to identify: blues, fritillaries, either Pale or Berger’s Clouded Yellow and so on. But also Swallowtail, Scarce Swallowtail, Red Admiral, Brimstone, Orange Tip. And this, the Southern White Admiral; another iPhone picture but it has come out looking surprisingly good. Most of the time they didn’t actually look that blue, but the light was obviously catching it just right.

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As well as butterflies, there were a few other things; lots of burnet moths flying around, which are always nice, and the Narrow-bordered Bee Hawkmoth I mentioned earlier. Those big black ants which are one of my earliest memories of southern Europe. And one critter that was a real puzzle. Take a look at this:

Now maybe you know what that is, but it confused the hell out of me. It looks most like a dragonfly, sort of, and it flies rather like a dragonfly, but the head isn’t right and look at those antennae! They were almost enough to make me think it was some kind of weird clearwing moth or even weirder butterfly — but it just doesn’t look right for either.

Thankfully for the sake of my sanity, my mother’s superior Google skills came to the rescue when we got back: it is an owlfly. A what? I’d never heard of them. They are related, Wikipedia informs me, to the lacewings and antlions, something which is not at all apparent when you see them sitting with their wings spread like dragonflies, but which makes more sense when you occasionally see one with its wings folded.

» All the pictures except the last were taken by me. The last is Libelloides coccajus, uploaded to Flickr by and © Le pot-ager (Philippe Vannier).

Categories
Nature

Your Inner Fish by Neil Shubin

Your Inner Fish is a book which uses comparisons between human anatomy and the anatomy of other animals, living or extinct, to show how evolution helps explain the way we are and the way our bodies develop. Shubin is the palaeontologist who discovered Tiktaalik, one of the key fossils in understanding the fish/tetrapod transition, so that features somewhat, but he also draws on a wide range of examples from other species. tiktaalik

So for example, he traces the evolution of fin into hand over evolutionary history, but also examines how the growing embryo creates a hand (or a fin) from a blob of undifferentiated cells. He uses the evolutionary relationship between the structure of the human head and the gill arches of a shark to explain why the nerves of the head have such a peculiar relationship, how hiccuping is related to our amphibian ancestry, and so on.

Most of this material is rather technical and many of the examples were somewhat familiar to me, so the book could easily have been either impenetrable or just dull. In fact I found it worked very well; even when I had encountered some of the examples before, having them all put together into one book was very helpful. I really did feel after reading it that I was more in touch with my inner fish (and inner wormy thing, for that matter).

And it’s well written, as well. There was a rather clumsy bit in one the first chapter where he attempts to explain cladistics via a visit to the zoo, which had me worried that the book was going to be aimed at eleven-year-olds, but fortunately it turned out to be a blip. Generally the book seems well-pitched for intelligent adults who are curious about biology.

Categories
Nature

Wolf flu

The swine flu outbreak had me thinking: presumably the very nature of infectious diseases means that, if you want to beat them, you have to act fast and take large-scale measures. You have to act, every time, as though this one is The Big One because if it is, then time is of the essence.

But of course it means the authorities are open to accusations of needless alarmism and crying wolf. This is the third ‘pandemic’ this decade, after SARS and bird flu; how many times can we have these alerts before people stop taking them seriously?

Although as long as governments keep taking them seriously, perhaps it would be no bad thing if the media treated them more as routine news stories and less like the first horseman of the apocalypse had just appeared.

I’m assuming, btw, that the swine flu is not going to be the pandemic that kills us all. I hope I’m not tempting fate.

» The photo is ‘Padrecito Posero’, © Eneas De Troya and used under a CC attribution licence.