it might not be the same kind, I think they are specific to varieties. Gooseberry sawfly loves gooseberries and currants (although my currants don't ever seem to suffer much). There was a program on the other day showing a whole cemetary covered in cobwebs as the caterpillars weaved in the whole place - and the cherry trees, looked very spooky!
I really don't have the time to pick them all off this year, but the hens love them as a little treat. I just wondered what is wrong with our wild birds, that's their job, really, isn't it??