They are at it again. I have posted on these previously this year, and these sawfly larvae, called Large Rose Sawfly (Arge pagana), are stripping my rose-bush leaves again. They seem to be very methodical in their consumption of the leaves, completely stripping individual leaves bare before moving onto others, leaving ravaged skeleton stalks behind them. They must be another generation.
But if the little birds catch site of them, they are a good source of protein.
Photograph of Large Rose Sawfly (Arge pagana), taken August 2016, rear garden , Staffordshire. © Pete Hillman 2016. Camera used Nikon D7200, with Sigma 105mm macro lens with softbox flash diffuser.