But that's nature! After all - that's what crows and other carrion animals would eat in winter. I am sure there will be some that have survived, if not they will come and move in from somewhere else! I have a toad living in polytunnel, and thought it didn't survive last winter's severe frost, but there, late spring here s/he was - it always comes out when you least expect it (and yes I jump, it frightens the living daylight of me!)