|Atta colombica carrying a leaf segment|
Workers of this species are maroon in colour, and are entirely matte, with no shiny spots.
Atta colombica produces visible refuse dumps of spent fungus on the surface. These dumps often take the form of large, conical mounds, and are located to the side of the main soil mounds. Lines of workers carry the spent fungus from the nest to the dumps. They deposit the grayish-white pellets at the peak of the mounds, which produces the conical shape. This behaviour is different from A. cephalotes which deposit their refuse in subterranean dumps.
- M. A. Bowers & S. D. Porter (1981). "Effect of foraging distance on water content of substrates harvested by Atta columbica (Guerin)". Ecology 62 (1): 273–275. doi:10.2307/1936686. JSTOR 1936686.
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- Kathryn M. Sullan, Catrina A. Lindgren & Abigail Adams (2006). "Resource preference and foraging efficiency in leaf-cutter (Atta columbica) ants" (PDF). Dartmouth Studies in Tropical Ecology (Dartmouth College).
- Atta colombica minor workers tending to their fungus garden
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