All posts by Ian Alexander

I have been in love with nature as long as I can remember. Nature photography, birdwatching, lichens, fossils, orchids, mountains, insects, everything else. Conservation, gardening at home, community gardening. I've loved it all.

Insects on Thursley Common

Common Blue butterfly on Bell Heather
Don’t eat me!
Emperor moth caterpillar being eaten by ants

Thursley Common scene looking across bog with dead Pines, open lake with Canada geese, encroaching Birch scrub and Pine forest in the distance
Goldfinch atop Pine tree
Tailless Lizard on boardwalk
Honey-scented banks of Bell Heather, Gorse, Birch on Thursley Common
Bee-Wolf with Bee prey
Small Ammophila Sand-wasp, scurrying about in the heather searching for prey
Thursley Common: managing the heather by mowing irregular strips
Black-Tailed Skimmer

Keeled Skimmer
Black Darter, a tiny dragonfly
Common Darter
Thursley Common – the sandy paths full of sand-wasps and bee-wolves, the heather full of bees and grasshoppers

Also saw Common Blue Damselfly, Southern Hawker, Emperor Dragonfly.

Grasshoppers up close!

Meadow Grasshopper in Gunnersbury Triangle’s Anthill Meadow
Field Grasshopper, on a refugium
Common Darter female on dried bramble in Picnic Meadow
Jersey Tiger by pond boardwalk with red underwing; yellow underwing specimens are also visible around the reserve. The underwing colour appears as a startling flash when the insect takes off, but unlike many other moths, grasshoppers and so on which have such deimatic coloration, the Jersey Tiger is conspicuous when it rests. There must be a reason for the polymorphism; perhaps the startle effect works better when a predator has not seen too many insects with a particular underwing colour.

A Marvellous Hoverfly with a semi-transparent middle

Hoverfly Leucozona lucorum
This hoverfly has a middle that lets light through as it flies, and orangey and black bands on its wings that line up with its pellucid middle and black bottom, giving it a strongly banded wasplike appearance despite (to us) being obviously a Dipteran fly. Probably enough to make it a successful Batesian mimic!

For a moment I glimpsed the brilliant indigo of a Banded Demoiselle (Calopteryx splendens), just near Gunnersbury Triangle’s picnic meadow. It was the very first sighting of that species in the reserve: a bit surprising, as it’s a species of slow-flowing rivers. It does occasionally frequent lakes, so perhaps there’s a population near the artificial waterfall over in Chiswick Business Park? I’d better go and have a look!

Stop Thief! Who Stole My Hazelnuts? But a Valuable Clue…

Scene of the Crime: Someone able to Climb Trees, Carry Nuts, and Crack them Open Swiftly
Crime Scene Close-up: Hazelnuts Skilfully Opened, Contents Eaten …
we know who the villain is: Grey Squirrel!
All’s Well That Ends Well: a Rich Hazelnut Harvest, Still Green and Leafy!
If you can’t beat ’em, join ’em: despite the record early morning heat (already 26C at 8am, imagine), I at once went out with a sun-hat and picked all the hazelnuts I could find, leaving one or two for the, ah, wildlife. After all, if a Professional Hazel-Eater says it’s Harvest Time, the sensible thing to do is to believe them. A clue, not only of the Inspector Clouseau sort.
Hazelnut Cluster Symmetries: you may think hazelnuts come in twos or threes, but they can come in ones, twos, threes, fours, or even fives, making themselves as symmetrical as they can. So, a two means they’re in a line, three in a triangle, four in a tetrahedron…