Paratrechina longicornis crazy ants scavenging a trap-jaw ant carcass. Paratrechina group-transport their food, a rapid method, allowing them to secure resources before slower but more aggressive competing species. Archbold Biological Station, Florida, USA

Pheidole obscurithorax stays ahead of the competition using group retrieval of food items (in this case, a scavenged wasp carcass). Working together the ants can usually get the bounty home before a more aggressive species usurps their find. P. obscurithorax is a regular competitor of Solenopsis fire ants, both in its native Argentina and along the U.S. gulf coast where both species have been introduced. Entre Rios, Argentina