Category Archives: natural history

environment, links, natural history, thoughts, topographical

Links of the Week

This week’s small selection of the curious and not-so-curious you may have missed …

According to a recent survey people spend too long in the shower and use too much water. And it isn’t as green as we were told. Now there’s a surprise!

But then no wonder we go for the therapeutic, because according to uSwitch the UK is the worst place in Europe to live. Well it is if you care about what they measure. For geeks like me you can follow their method, recalculate the scores, exclude things you don’t care about and add in other things you do care about. But you’ll still get much the same answer. 🙁

HornetNow here’s a seriously WOW! image. Yes it’s a European Hornet, Vespa crabro; a humongous but relatively docile wasp**. Sadly you don’t see them often. But just look at those compound eyes … and the detail which I’m sure shows the substructure underneath the eye. I’ve looked out other images of hornets and they all seem to show the same eye substructure. Absolutely amazing!

** Note. Hornets are brown and yellow, as in the image. If what you see is black and yellow it’s a wasp, not a hornet, regardless of its size. Please leave all these creatures alone. They generally won’t attack you unless you provoke them. Wasps and Hornets are superb predators of other insects, on which they feed their grubs. Without them we’d be knee-deep in caterpillars etc. They also chew up old wood for their nests. Besides Hornets are becoming endangered.

If you had a pet monkey, would you feed it crap food and never let it exercise or play and tell it how stupid and ugly it was? No, you’d love your pet monkey! So love your Monkey!

We all make mistakes. They’re nothing to hide. But we all do hide mistake, because they make us feel stupid. Don’t be afraid of Stupid. Stupid means self-awareness. Stupid means you’re learning. Love your Stupid.

natural history, photography

Green Autumn

It’s a warm and green autumn in the UK this year. It is mid-November; the daytime temperature is stills several degrees above average; I’m not aware that we’ve had any frost yet; and the fish in the pond are still feeding (in a normal year they stop feeding for the winter in mid-October).

What’s interesting is that it has highlighted something I’ve known about for some time but which we don’t usually see in action so clearly. That’s the way in which (deciduous) trees lose their leaves.

As I understand it (and I can find nothing to substantiate this) there are two triggers to autumn leave loss: day length and temperature. Some trees start losing leaves when the hours of daylight fall below some critical point. For other trees the trigger is consistently low temperatures.

No I have no idea exactly what the trigger points are in detail, and I would expect them to vary between species. Some trees may also of course have a combined trigger where day length and temperature both have to fall; and again I would expect this to vary greatly by species.

But it is noticeable this year that some trees have lost their leaves according to much their normal schedule (presumably due to changes in day length triggering the process) and others are still green (where presumably the trigger is a drop in temperature).

Coming back from the supermarket this morning I did a quick, fairly unscientific, check and found:

Trees that have (mostly)
lost their leaves		 Trees which are (largely)
still green
Ash
Poplar
Hawthorn
Horse Chestnut*
Beech
Cherry
Silver Birch
London Plane		 Alder
Oak

Can anyone confirm that I am right about the triggers and that the trees I see are acting the way they should?

And can someone please arrange some proper cold weather. I don’t like these warm winters — if only because they tend to be grey and murky. I’d rather have cold and alpine. And besides, as the old saw goes:

A green Christmas means a fat churchyard.

* Horse Chestnut may be a red herring as most of the trees around here are infected with the leaf-mining moth Cameraria ohridella which is affecting these trees progressively across most of the country. This causes early leaf death.

beliefs, food+drink, memes, natural history

Listography – Random

2 Comments

Yet again I’ve not done Kate’s Listography for a few weeks, in part because she has used several weeks of Listography space running a Top 5 Toys for Christmas survey for which I wasn’t eligible (‘cos her rule said “parents only”).

But this week we’re back to normal and I’ll let Kate herself introduce this week’s exam:

This week’s Listography is simple but with a very wide scope — Top 5 Random Things I Like.

Just one word of warning though – random is not ‘I like chocolate’ — that’s just not going to cut it round here. However ‘I like chocolate sauce with my chips’ is getting a bit warmer.

So, in the hope that my choices are whacky enough, here we go …

  1. Wasps. They generally get a bad rap, and I would agree can be annoying. But they are superb creatures and wonderful predators. Without them we’d be knee deep in creepy crawlies.
  2. Plane Crashes. Not because I like seeing people hurt or killed. Of course I don’t and I wouldn’t wish it on anyone. No, my interest is forensic and analytical: I like to try to see if I can work out guess what happened and why. Think of it as a giant puzzle game.
  3. Curry with Avocado, Banana and Mayonnaise on the Side. Yep it works really well. Chopped avocado and chopped banana. Mayonnaise instead of yoghurt dressing (although I like that too). It’s a nice combination of flavours and contrasts of hot and cooling.
  4. Latin Liturgy. Despite not being at all religious — indeed I’m anti-religious — I do find that proper Tridentine Latin Mass does something to me. Well it is a spell, isn’t it?!
  5. Deep-fried Haggis. Yep again this works wonderfully well. I first met it 40 years ago when a student: the chip shop nearest the university in York used to sell it. Sausage-sized haggis, thickly battered and deep fried. And bloody good it was too especially on a cold winter’s night after a few pints. Sadly I don’t recall seeing anyone doing it since. And anyone want to try deep fried black pudding — I reckon that would be good too.

So there you are. I’m sure I have more interesting “random likes” than this but they escape me for now. Anyone care to add to the list?

memes, natural history, words

Word of the Week : Amaranth

Amaranth

1. An imaginary flower reputed never to fade; a fadeless flower (as a poetic conception).
2. A genus of ornamental plants (Amarantus, family Amarantaceæ) with coloured foliage, of which the Prince’s Feather and Love-lies-bleeding are species.
3. A purple colour, being that of the foliage of Amarantus.
4. A yellow amaranth: A composite plant (Helichrysum Stœchas).

memes, natural history, personal, photography

[42/52] Green Woodpecker

[42/52] Green Woodpecker
Week 42 entry for 52 weeks challenge.

Green Woodpecker (probably male) this morning on our next door neighbour’s lawn. This is the third or fourth time I’ve seen him visiting in the last 2-3 weeks. He spends a lot of time (I watched him for 45 minutes one day) covering the same area, so it must be very rich in ants.

Taken at a range of 20-25 yards from our study window with my biggest lens and still this is a small crop from the middle of a frame.

natural history, photography, topographical

Weasel!

Weasel

Weasel!

Weasel??!!??

Blimey, that is a weasel!

Something I never expected to see in suburban London — at least not in broad daylight. And I think it is only the third time I’ve ever seen a weasel, the previous two times being fleeting glimpses in the twilight as they disappear out of sight at breakneck speed.

This one was running around on the pavement and road (trying hard to get run over – stupid creature) on the busy Greenford Road right outside the Bridge Hotel about 1130 yesterday morning. (If you go to the “Location” tag at the bottom of this page, or to the Flickr image, you can see exactly where this is on the map.) The beastie is here seen lurking under a piece of metal barrier; (s)he’s probably about 15cm (6 inches) long in the body.

It was so fast it was a question of point the camera out of the car window in vaguely the right direction and hope. I got one shot in before the lights changed (and I almost missed that!). This is a tiny crop from the middle of that one shot.

memes, natural history, quotes, science

Word of the Week

Hoatzin

A species of colourful, remarkably saurian, chicken-like bird, Opisthocomus hoazin, found in swamps, riverine forest and mangrove of the Amazon and the Orinoco deltas of South America. It is notable for having chicks that possess claws on two of their wing digits; the chicks are also able to swim and climb — useful when you’re a pheasant-sized bird which nests in trees over water!

It is brown in colour, with paler underparts and an unfeathered blue face with maroon eyes; its head is topped by a spiky, rufous crest. The Hoatzin is herbivorous and has an unusual digestive system with an enlarged crop used for fermentation of vegetable matter — broadly analogous to the digestive system of mammalian ruminants. It’s common name of Stinkbird is due to the strong smell produced by the bird, perhaps due to its consumption and fermentation of leaves.

Despite its striking plumage, unwary nature and poor flight it seems to be only rarely hunted by the indigenous peoples of its native range. Consequently it is not endangered. It is the national bird of Guyana.

natural history, personal, photography, science

Skills I Do Not Have, No. 253 of 44975

Common Wasp, Vespula vulgaris by kcm76
Common Wasp, Vespula vulgaris, a photo by kcm76 on Flickr.

I present you with the Common Wasp, Vespula vulgaris.

I found this critter dead on the bedroom floor this morning and in picking it up for recycling I realised just what stunning creatures wasps are. We so often think of them a nuisanceful pests whereas they’re amazingly engineered and even in death almost beautiful. So I had to photograph it – click the links below for larger views.

Image 1 (top left) shows just how hairy they are when we think of them as bald. And you can just see the tiny, shiny bulge of the top of the wasp’s compound eye.
Image 2 (top right) shows some of the mazing engineering: just look at the hooks and barbs on the legs – just what is needed for gripping caterpillar/insect prey and crawling over plants.
Image 3 (bottom left) shows the face and jaws which are the characteristics that identify this as Vespula vulgaris rather than any of the other UK species.
Image 4 shows something I’d never realised before (although my book shows it clearly) and that’s that wasps have two pairs of wings: look carefully and you can see in front of the large main wing a smaller wing. No wonder they’re such skilled flyers.

These are tiny, amazingly delicate yet robust insects. This individual, a worker, is just 12mm long with a wingspan of about 22mm. In her lifetime she may well have “salvaged” numerous flies, caterpillars etc. as food for the next generation of grubs – without wasps we would be knee deep in creepy crawlies.

This was taken under my desk lamp (hence the slight colour cast) with my point-an-shoot Lumic TZ8 – which is amazing for macros like this as it will focus down to just a couple of centimetres (much better than my dSLR)!

And as I was taking these I thought: how the hell do you go about dissecting something this small? Clearly scientists have done so, but it’s a skill I don’t have and I’m not dexterous enough to ever conceive how to do it! Amazing insects and amazing scientific work to dissect one!

Montage created with fd’s Flickr Toys