cimbex femoratus, the birch sawfly caterpillars

cimbex femoratus birch sawfly caterpillars green insect caterpillar larva symphyta larvae hymenoptera closeup nature wildlife garden natural finland maggot wasp animal macro wild entomology fly leaf invertebrate biology pest pests eating yellow larval sawflies insecta creep depth field cimbicidae close background creature worm fauna pretty feeding silver woodland