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Costa Rica: lowland wet forest throughout the country, to 1000m elevation (La Selva, 500m in Braulio Carrillo National Park, Rara Avis, Hitoy Cerere, Corcovado, Arenal, Tortuguero, Penas Blancas, Pitilla).
This species is one of the more common large carpenter ants in Costa Rica. It inhabits mature wet forest. Workers are encountered frequently as nocturnal foragers, and they are also relatively abundant in fogging samples and Malaise traps.
I have seen nests three times, and they have all been in the context of surveys of Cecropia ants. One nest was in a sapling along a roadside. In another case I pulled down a Cecropia obtusifolia branch and it contained workers of both Azteca alfari and Camponotus JTL-005. The third nest was at Rara Avis. I dissected a 4-5m tall Cecropia obtusifolia tree. It had heavy Atta damage and almost no foliage. The branch tips contained scattered groups of workers and brood of Azteca alfari, but the entire main trunk of the tree was occupied by a giant Camponotus nest.
Found most commonly in these habitats: 23 times found in montane wet forest, 7 times found in lowland rainforest, 4 times found in wet forest, 1 times found in wet forest edge, 1 times found in CCL 237, east 3m, 2 times found in mature wet forest, 1 times found in roadside vegetation, 1 times found in mature rainforest, 1 times found in 2° moist forest, 2 times found in Primary wet forest, ...
Found most commonly in these microhabitats: 4 times Malaise trap, 1 times ex Cecropia obtusifolia, 1 times nocturnal strays on ground, 1 times nocturnal foragers, 1 times nest in Cecropia sapling, 1 times under rotten wood., 1 times strays, 1 times nest in live tree, 2 times ex sifted leaf litter, 1 times Wet forest. Strays. Azteca queen in Cecropia internode., 1 times Wet forest. Night collecting. Strays on trail surface. Large Gnamptogenys low on, ...
Collected most commonly using these methods: 26 times Malaise, 12 times search, 3 times Malaise trap, 4 times Blacklight, 3 times Fogging, 2 times flight intercept trap, 1 times maxiWinkler, 1 times miniWinkler, 1 times Sweeping, 1 times beating.
Elevations: collected from 5 - 1230 meters, 350 meters average