I noticed this very hairy little fella on the 9th October, 2009 making his way quite happily along a dirt track on the Upton Ham, a massive (60 hectare) SSSI-designated site situated alongside the river close to Upton-upon-Severn. I’ve added it here simply because I’ve managed to get a good close-up shot of his teeth, ideally suited as they are for chewing vegetation.As for which species it is….there’s a general rule of thumb maintaining that if a caterpillar is quite small and very hairy, then it’s probably some kind of Fritillary-type Butterfly larvae,  but if it’s big and hairy, then it’s probably a Tiger Moth of some sort or that of a Fox Moth. Fair enough, but that’s no help if you’re trying to tell a Bill Oddie from a Hagrid when they’re a long way away!