Eciton burchellii submajor carrying a spider. This long-legged caste is specialized for transporting large or awkward prey. Maquipucuna reserve, Pichincha, Ecuador

Anonychomyrma workers aggressively defend the carcass of a carpenter ant they have found from would-be usurpers. Harrietville, Victoria, Australia

Pheidole obscurithorax stays ahead of the competition using group retrieval of food (in this case, a scavenged cockroach carcass). Working together, the ants can usually get the bounty home before a more aggressive species usurps their find. Orlando, Florida, USA