Small Tortoiseshell butterfly caterpillars twitch in unison 01.

Low resolution sample – 4K version available

A close up shot of lots of black, small tortoiseshell butterfly caterpillars (Aglais urticae) twitching and jerking in unison, which is a defence mechanism against predators. 4K locked tripod shot. (Ref. Insect 44)

Royalty free 4K stock footage available for purchase exclusively at Pond5: