Foraging workers of leafcutter ants (Atta sp.) and big-headed ants (Phediole sp.) fight over a dropped cookie in Costa Rica.
Cuckoo wasp, Chrysididae, near the shore of Lake Yellowstone (Wyoming, USA). These gorgeous solitary wasps are kleptoparasites of other solitary larvae-provisioning bees and wasps, meaning that they lay their eggs in rival nests. Once hatched, their young consume the hapless host egg or larva and steal its stored resources for itself.
A trio of paper wasps (Polistinae) build a nest in the jungle understory in Panama.
