Cephalotes varians turtle ants. To enter her nest in a mangrove twig, a foraging worker must pass the door-guarding soldier whose head is roughly the same size and shape as the entrance. These ants don't build the nests themselves; rather, they inhabit burrows made by beetle larvae.

Florida Keys, USA
Worker and soldier Reticulitermes subterranean termites.

California, USA
Camponotus floridanus

Archbold Biological Station, Florida
Pheidole obscurithorax is a South American native that has been introduced to the U.S. gulf coast. 

Pensacola, Florida, USA
Pheidologeton affinis, supermajor and minor workers attacking a beetle grub. Supermajors have powerful mandibles useful for cutting up and carrying large prey items.  The supermajor pictured here was able to single-handedly drag this very large beetle larva across the substrate while I photographed them.

Rossville, Queensland, Australia
Pheidologeton affinis, supermajor and minor workers. Pheidologeton has one of the most pronounced size differences among nestmate workers of any ant.

Rossville, Queensland, Australia
Pheidole xerophila is a common small seed harvester in the deserts of the American southwest.  Here are major and minor workers along a foraging trail.

Mojave National Preserve, California, USA
Pheidole tepicana

Arizona, USA
Iridomyrmex dromus

Yandoit, Victoria, Australia
Pheidole obscurithorax is a South American native that has been introduced to the U.S. gulf coast.

Pensacola, Florida, USA
Pheidole obscurithorax is a South American native that has been introduced to the U.S. gulf coast. 

Pensacola, Florida, USA
Pheidole obscurithorax is a South American native that has been introduced to the U.S. gulf coast.

Pensacola, Florida, USA
See photo in original gallery.
all images and text © Alex Wild 2001-2013