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Brachymyrmex obscurior is a South American species that has been introduced to tropical and subtropical climates around the world. Archbold Biological Station, Florida, USA
Brachymyrmex obscurior rover ants carry sand grains out from an excavation deep within their nest. Archbold Biological Station, Florida, USA
Argentine ants (Linepithema humile), an aggressive pest species introduced by human commerce to California, attack a native Pogonomyrmex harvester ant. Native ants in many places around the world have disappeared in areas invaded by Argentine ants. Davis, California, USA
Argentine ants (Linepithema humile), an aggressive pest species introduced by human commerce to California, attack a native Pogonomyrmex harvester ant. Native ants in many places around the world have disappeared in areas invaded by Argentine ants. Davis, California, USA
Argentine ants (Linepithema humile) fighting. Argentine ants typically form large supercolonies comprising millions of ants and thousands of nests. Within these massive supercolonies fighting is rare, but ants from neighboring supercolonies readily attack each other. Córdoba, Argentina
Argentine ants (Linepithema humile tending scale insects on an orange tree in suburban California. Davis, California, USA
A trail of Argentine ants, Linepithema humile. Davis, California, USA
Linepithema humile, the Argentine ant. Davis, California, USA
Brachymyrmex patagonicus Tucson, Arizona, USA
Brachymyrmex obscurior is a South American species that has been introduced to tropical and subtropical climates around the world.

Archbold Biological Station, Florida, USA
Brachymyrmex obscurior is a South American species that has been introduced to tropical and subtropical climates around the world. Archbold Biological Station, Florida, USA
Brachymyrmex obscurior is a South American species that has been introduced to tropical and subtropical climates around the world.

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