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A soldier Cephalotes porrasi turtle ant seals the nest entrance with her head (left), while one of her sisters passes by. Soldiers act as living doors, allowing only members of their own colonies to pass. Armenia, Belize
A soldier Cephalotes porrasi turtle ant seals the nest entrance with her head (left), while one of her sisters passes by. Soldiers act as living doors, allowing only members of their own colonies to pass. Armenia, Belize
A Camponotus major worker. Icononzo, Tolima, Colombia
Camponotus (Colobopsis) impressus major worker. The blunt head serves as a living door to this species' twig nests. Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus major worker. The blunt head serves as a living door to this species' twig nests. Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus major worker. The blunt head serves as a living door to this species' twig nests. Laboratory colony at the University of Central Florida, USA
Camponotus (Colobopsis) impressus major worker. The blunt head serves as a living door to this species' twig nests. Laboratory colony at the University of Central Florida, USA
Camponotus ulcerosus major worker, showing the enlarged head she uses for plugging the nest entrance. Sierra Vista, Arizona, USA
Ants that nest in trees often have bizarre adaptations for plugging the entrances to their nests. This Camponotus papago queen has a cork-like head that doubles as a door. Santa Rita Mountains, Arizona, USA
A Camponotus major worker.

Icononzo, Tolima, Colombia
A Camponotus major worker. Icononzo, Tolima, Colombia
A Camponotus major worker.

Icononzo, Tolima, Colombia
See photo in original gallery.
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all images and text © Alex Wild 2001-2013