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A busy trail of Monomorium pharaonis pharaoh ants. This species is now among the most pesty house-inhabitating ants worldwide. Icononzo, Tolima, Colombia
Friend or foe? Two Monomorium pharaonis worker ants briefly touch antennae along a pheromone trail. Icononzo, Tolima, Colombia
A busy trail of Monomorium pharaonis pharaoh ants. This species is now among the most pesty house-inhabitating ants worldwide. Icononzo, Tolima, Colombia
Friend or foe? Two Monomorium pharaonis worker ants briefly touch antennae along a pheromone trail. Icononzo, Tolima, Colombia
A busy trail of Odorous House Ants, Tapinoma sessile. The trail is maintained by a chemical laid down by ants as they pass. Urbana, Illinois, USA
A busy trail of Odorous House Ants, Tapinoma sessile. The trail is maintained by a chemical laid down by ants as they pass. Urbana, Illinois, USA
Hyalophora cecropia, male antennae Urbana, Illinois, USA
An underground trail of a South American army ant (Neivamyrmex bohlsi). The colony has workers of many different sizes, allowing the ants to attack and transport a larger range of prey. Lagunas Yala, Jujuy, Argentina
Friend or foe? Two Wasmannia auropunctata meet on a foraging trail and briefly assess each other. Ants from different colonies will attack each other, but these two are nestmates and let each other pass. Gamboa, Panama
A busy trail of Monomorium pharaonis pharaoh ants. This species is now among the most pesty house-inhabitating ants worldwide.

Icononzo, Tolima, Colombia
A busy trail of Monomorium pharaonis pharaoh ants. This species is now among the most pesty house-inhabitating ants worldwide. Icononzo, Tolima, Colombia
A busy trail of Monomorium pharaonis pharaoh ants. This species is now among the most pesty house-inhabitating ants worldwide.

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