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Natural History: C. ashmeadi nests above ground and forages mostly in tree canopies and on lianas, in columns up and down tree trunks and vines to gain access to low vegetation. In Forest Park in St. Louis, the arboreal habitat of this species has allowed it to survive the depredations of Tetramorium tsushimae. Like all Crematogaster, this species feeds heavily on the secretions of extrafloral nectaries and honeydew-excreting hemipterans. Workers may also drink fluids from bird droppings on foliage, carrion and other protein-rich tidbits. Sexuals are reared in early summer.
Found most commonly in these habitats: 2 times found in pine/palmetto flatwoods, 5 times found in Mixed hardwood forest, 3 times found in Suburban with wide-spaced, 3 times found in oak-pine woodland, 1 times found in Hardwoods in lawn, 2 times found in Sandy beach, 2 times found in Mixed subtropical forest, 2 times found in Pine woodland, 2 times found in Tropical Hammock, 1 times found in pine/oak managed forest, ...
Found most commonly in these microhabitats: 16 times nest in twig above ground, 1 times ex dead pecan branch on ground, 1 times in dead pine knot, 1 times dead twig pine, 3 times on tree trunk, 1 times in bamboo, 2 times hardwood trees, 2 times foraging on low vegetation, 1 times turkey oak woods. Diurnal stray, 2 times ex rotten log, 2 times ex dead twig of Pinus elliottii, ...
Collected most commonly using these methods: 12 times search, 10 times direct collection, 1 times beating vegetation (1 hour), 1 times hand collected, 1 times Winkler.
Elevations: collected from 2 - 335 meters, 66 meters average