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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, 4 times found in lowland rainforest, 1 times found in CCL 237, east 3m, 2 times found in mature wet forest, 1 times found in mature rainforest, 1 times found in roadside vegetation, 1 times found in wet forest, 1 times found in 2° moist forest, 1 times found in tropical wet forest, 1 times found in La Selva, ...
Found most commonly in these microhabitats: 1 times Wet forest edge; I dissected a 4-5m tall Cecropia obtusifolia. The tree had heav, 1 times nocturnal strays on ground, 1 times nocturnal foragers, 1 times nest in Cecropia sapling, 2 times Malaise trap, 1 times nest in live tree, 1 times Wet forest; under rotten wood., 1 times strays, 1 times Primary wet forest. Various ant species from a rotten log. Each species is repre, 1 times nocturnal stray, strays on vegetation times night collecting near blacklight #3. #3408-s, ...
Collected most commonly using these methods: 26 times Malaise, 12 times search, 4 times Blacklight, 3 times Fogging, 2 times flight intercept trap, 1 times Malaise trap, 1 times Sweeping, 1 times beating, 1 times miniWinkler.
Elevations: collected from 5 - 1230 meters, 346 meters average