This is the time of year when I take school groups out on walks to show them the delights of our countryside. I'm normally too busy doing identifications to get decent photographs, but I do manage to squeeze in a few.
This is the major season for hoverflies: hedgerows, verges, gardens and woodland are all buzzing with them as they carry out their vital pollination.
This is
Cheilosia illustrata, which I only ever find - in small numbers - on Umbellifers (Hogweed in this instance) at the edge of woodland:
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| The hoverfly Cheilosia illustrata |
The larvae of
Cheilosia illustrata mine the lower stems of Hogweed.
The Syrphus family hoverflies are all very similar and can usually only be separated by examining microscopic characters. This is
Syrphus torvus, which can be identified by the hairy eyes:
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| The hoverfly Syrphus torvus (male) |
The larvae of
Syrphus torvus are aphid eaters.
New to me.
One of the great things about the internet is the way in which it connects people. As a result of online communications, I know that there has been a recent inwards migration of numerous butterflies, moths and other insects;
Eupeodes corollae is one of them:
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| The hoverfly Eupeodes corollae |
The larvae of
Eupeodes corollae are also aphid eaters.
Soldier Flies are often mistaken for hoverflies, but the wing veins are distinctly different. There are a few metallic hoverflies, so the confusion is understandable.
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| Soldier Fly - Chloromyia formosa |
This is a suitable place to show an Ectemnius wasp. Ectemnius wasps make solitary burrows for their larvae, which they feed exclusively on hoverflies. They have evolved to resemble hoverflies, presumably so that they can sneak up on them without causing them to fly off.
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| Ectemnius sp. wasp |
Sometimes an opportunity arises to take a photograph which definitely fits more into the 'artistic' category:
This Ichneumonid was closely examining the flowers of Bush Vetch in the hope of finding some larvae to parasitise. I saw this backlit shot as it was moving from flower to flower:
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| Ichneumonid on Bush Vetch |
And now my new favourite photograph:
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| Ichneumonid parasitising moth larva in Cocksfoot grass |
The female Ichneumonid has detected a moth larva inside the seedhead of Cocksfoot grass, and has swung her ovipositor round to inject an egg into the caterpillar. The egg will stay dormant inside the caterpillar until it pupates, at which time the egg will hatch and consume the contents of the cocoon. It takes a great deal of patience to get a shot like that. Each shot requires perhaps 30 minutes of watching the wasp moving from seedhead to seedhead and waiting for the moment of injection. These are my favourite photographs.
This has been a tricky year for Damselflies and Dragonflies: I have seen very few. A trip to a local pond solved that for me. This is The Blue-tailed Damselfly:
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| Blue-tailed Damselfly |
And this is the Variable Damselfly -
Coenagrion pulchellum, which is new to me:
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| Variable Damselfly |
A tall, elegant grass has been bothering me for a couple of years, so I decided to identify it this year. It's Tufted Hair Grass -
Deschampsia cespitosa - which forms tufts and has stems that reach up to my shoulders. I usually find it where I would normally see Damselflies, so they must need similar conditions.
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| Tufted Hair-grass Deschampsia cespitosa |
New to me.
