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Fighting ensues when both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished. Morretes, Paraná, Brazil
When both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait I placed on the ground, fighting ensues. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished. Morretes, Paraná, Brazil
When both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait I placed on the ground, fighting ensues. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished. Morretes, Paraná, Brazil
Lytopylus (Braconidae: Agathidinae) wasp ovipositing into a sunflower. These insects are parasites of seed-feeding moths. Lake Forest, Illinois, USA
Mischocyttarus paper wasps. Jatun Sacha reserve, Napo, Ecuador
Atta cephalotes leafcutter ants. Maquipucuna reserve, Pichincha, Ecuador
Anelosimus social spiders cooperate to capture a grasshopper. Jatun Sacha reserve, Napo, Ecuador
Ophiocordyceps fungus growing from the carcass of a carpenter ant. Note how the ant's mandibles have gripped the leaf edge, anchoring it in place. This behavior is induced when the fungus takes partial control over the ant's brain. Jatun Sacha reserve, Napo, Ecuador
Along the margins of a raid, Eciton hamatum workers create a cache of captured ant brood. Jatun Sacha reserve, Napo, Ecuador
Fighting ensues when both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished.

Morretes, Paraná, Brazil
Fighting ensues when both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished. Morretes, Paraná, Brazil
Fighting ensues when both Acromyrmex disciger leafcutting ants and Pheidole vafra big-headed ants arrive at a cookie bait. Although the Pheidole won this particular fight, the larger battle went to the leafcutters, and within 20 minutes of taking this photo the Pheidole had vanished.

Morretes, Paraná, Brazil
See photo in original gallery.
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all images and text © Alex Wild 2001-2013