Sunday, 19 August 2012

Brimstone Colouring

Shoot enough pics of Brimstones flitting between flowers and you will eventually get some upper-surface shots, not normally seen because they always settle with wings closed. Here's a study on their colouring:

Male. The upper forewing is more deeply coloured than the rear.

Female.

In reflected light female (left) and male (right) appear rather similar.

Males appear a deeper yellow when the light is transmitted through those two upper layers:

Females appear more green in transmitted light.

All shot in West Wood today.

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