Is invertebrate activity increasing at last?

Factor in time and patience alongside the advent of digital cameras and a whole host of identification books, websites and the database of biological records soon starts to build up.  Even those species perceived as common have not always been thus, nor is it likely that they will remain thus – whatever happened to the hundreds of House Sparrows I recall feeding on spilt gian in the stack yard of ‘yesterday’?

Below is a fresh Wall butterfly, showing just one tear post its recent emergence.

Wall Crowle Moor south 9.6.13

Volucella bombylans, taken on Crowle Moors is a bumblebee mimic. Its typical form has a red-haired tail, there is a white-haired tail variety and a much rarer variety which has extensively pale hairs all over.

Volucella bombylans Crowle Moor 9.6.13

Chrysotoxum arcuatum is regarded as a northern and western species typical of wooded areas and moorland margins. On the wing May to September and peaking in June.

Chrysotoxum arcuatum Crowle Moor 9.6.13

Leucozona lucorum where a typical specimen is unmistakable, however Stubbs and Falk (2002) comment that a species reported as new to science in 2000 L. inopinata is difficult to seperate and advised care in areas like the East Anglian Brecklands. A useful website is the Hoverfly Recording Scheme part of the Dipterist’s Forum Recording Scheme.

Leucozona lucorum Sedge Hole Close 6.6.13

A new guide to these fascinating flies has been published by WildGuides, written by Stuart Ball and Roger Morris Britain’s Hoverflies: An Introduction to the Hoverflies of Britain. More than 500 remarkable photographs depict all 69 hoverfly genera and the 164 most commonly seen species in Britain that can be identified by eye or with a hand lens. A good companion to the long time standard reference British Hoverflies by Alan Stubbs and Steven Falk published in 2002 by the BENHS.

Thanks to Phil Lee for sharing his images with us.


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