<p>Pre- pupation.
Collected from birch at the small grey 'micro like' stage - I should know by now they are not micros and they grow into these big spotted beasts!
</p>
Wyre Forest, Worcestershire.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/26138378@N03">Patrick Clement</a> from West Midlands, England
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/26138378@N03/7156534579/">65.016  BF1659 Yellow Horned, Achlya flavicornis, larva</a>