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

Pensacola, Florida, USA
Pheidole obscurithorax

Pensacola, Florida, USA
Pheidole megacephala, the big-headed ant, is one of the world's most damaging invasive ant species.

Durban, South Africa
A trail of Pheidole rhea, North America's largest Pheidole species.

Tucson, Arizona, USA
A trail of Pheidole rhea, North America's largest Pheidole species.

Tucson, Arizona, USA
A soldier Eciton burchellii army ant.  The ice-tong shaped mandibles defend the colony against vertebrate predators. 

Captive colony at the California Academy of Sciences
A trail of Pheidole rhea, North America's largest Pheidole species.

Tucson, Arizona, USA
The long, sharp jaws of this Pheidole obscurithorax soldier indicate a predominately predatory species. 

Pensacola, Florida, USA
Pheidole megacephala, the big-headed ant, is one of the world's most damaging invasive ant species.

Durban, South Africa
Pheidole obscurithorax

Pensacola, Florida, USA
Pheidole obscurithorax

Pensacola, Florida, USA
Pheidole obscurithorax

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