Papilio polyxenes - eastern black swallowtail - larva Urbana, Illinois, USA
A Formica francoeuri field ant worker tending to the larva of a Great Copper butterfly (Lycaena xanthoides). The caterpillar produces secretions attractive to ants, and in turn the ants protect the caterpillar from predators and parasites. San Diego Co., California, USA
Larva of the great copper Lycaena xanthoides. San Diego Co., California, USA
