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Myrmecologist Ricardo ("Bob") Solar ponders the sharp mandibles of an Atta laevigata soldier, the world's largest leafcutter ant. Carrancas, Minas Gerais, Brazil
Myrmecologist Ricardo ("Bob") Solar ponders the sharp mandibles of an Atta laevigata soldier, the world's largest leafcutter ant. Carrancas, Minas Gerais, Brazil
Myrmecologist Ricardo ("Bob") Solar ponders the sharp mandibles of an Atta laevigata soldier, the world's largest leafcutter ant. Carrancas, Minas Gerais, Brazil
A queen Atta texana Texas leafcutter ant sits amid her much smaller daughters in the fungus garden. Laboratory colony at the University of Illinois at Urbana-Champaign
Atta texana leafcutter ant queen in the fungus garden. Laboratory colony at the University of Illinois at Urbana-Champaign
Atta texana Texas leafcutter ant, queen and workers in the fungus garden. In addition to the massize size difference between the mother queen and her daughters, note the difference in size among workers, each specialized for a different task in the nest. Laboratory colony at the University of Illinois at Urbana-Champaign
A queen Atta texana Texas leafcutter ant sits amid her much smaller daughters in the fungus garden. Laboratory colony at the University of Illinois at Urbana-Champaign
Nomamyrmex army ants are among the few animals that successfully attack leafcutter ant nests. The leafcutters are not without their defenses. Here two Atta workers attack and kill a Nomamyrmex esenbeckii scout, preventing the army ants from discovering the leafcutter's trail. Gamboa, Panama
The chaco leafcutter ant Atta vollenweideri forms the largest colonies of any social animal on earth. Mature nests such as the mound pictured here may contain several million ants. Note the cleared foraging trail leading away from the nest in the foreground. Resistencia, Chaco, Argentina
A queen Atta texana Texas leafcutter ant sits amid her much smaller daughters in the fungus garden.

Laboratory colony at the University of Illinois at Urbana-Champaign
A queen Atta texana Texas leafcutter ant sits amid her much smaller daughters in the fungus garden. Laboratory colony at the University of Illinois at Urbana-Champaign
A queen Atta texana Texas leafcutter ant sits amid her much smaller daughters in the fungus garden.

Laboratory colony at the University of Illinois at Urbana-Champaign
See photo in original gallery.
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all images and text © Alex Wild 2001-2013