Camponotus (Colobopsis) impressus with a pupa. Note the differences in size and shape between major and minor workers.

Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus is a small arboreal ant whose minor workers (right) mimic Crematogaster acrobat ants. The major workers (left) serve as living doors, plugging nest entrances with an enlarged head.

Laboratory colony at the University of Central Florida, USA
Pheidole morrisi is a common soil-nesting ant in sandy habitats in southeastern North America. This photo shows a major (left) and minor worker from the same colony.

Orlando, Florida, USA
Tetramorium bicarinatum foragers gather sugar-laden nectar from the underside of a leaf.

Orlando, Florida, USA
Oecophylla smaragdina weaver ants have killed a trap-jaw ant and are cooperating to carry it up a tree branch to their nest. 

Cape Tribulation, Queensland, Australia
Unrolling a leaf nest of a small weaver ant Polyrhachis (Cyrtomyrma) robsoni reveals a queen.

Cape Tribulation, Queensland, Australia
Unrolling a leaf nest of a small weaver ant Polyrhachis (Cyrtomyrma) robsoni reveals a queen.

Cape Tribulation, Queensland, Australia
Ponera worker and larvae.

Diamond Creek, Victoria, Australia
Monomorium sydneyense queen and workers in the nest.

Diamond Creek, Victoria, Australia
Camponotus (Colobopsis) impressus is a small arboreal ant whose minor workers (right) mimic Crematogaster acrobat ants. The major workers (left) serve as living doors, plugging nest entrances with an enlarged head.

Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus is a small arboreal ant whose minor workers (right) mimic Crematogaster acrobat ants. The major workers (left) serve as living doors, plugging nest entrances with an enlarged head.

Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus is a small arboreal ant whose minor workers (right) mimic Crematogaster acrobat ants. The major workers (left) serve as living doors, plugging nest entrances with an enlarged head.

Laboratory colony at the University of Central Florida, USA
See photo in original gallery.
all images and text © Alex Wild 2001-2013