@sciencebase We get that sort of larva here, but they are rather small (150mm, 2mm diam). Called 'loopers', very staccato movement. I don't know what they are. Any ideas?
@sciencebase I didn't realise they went like that cos they've only got legs at the front and back. Seems like an odd adaption at first sight. Like a kind of Lep with only one wing.