[KeenTeen17]

Originally Posted by mrshcurtis

the caterpillar looks slightly different from the one in the link sent but thank you. they looked a bit like this Google Image Result for http://extension.missouri.edu/explore/images/ipm1019dustybirchsawfly.jpg fuzzier. sorry, this is a realy puzzle as i'm not much help but i appreciate you all checking in and letting me know what you think!

I don't think we get the Dusky Birch Sawfly in the UK. Its American most likely. If we get some agreements on the plant ID then we can ID the caterpillar by looking at which species are common on the plant. I like puzzles