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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, 0 times found in Mixed hardwood forest, 3 times found in Suburban with wide-spaced, 1 times found in Hardwoods in lawn, 0 times found in woodland, 1 times found in pine/oak managed forest, 2 times found in Pinus clausa old growth, 0 times found in Mixed hardwood fores, 0 times found in Sandy beach, 0 times found in Mixed subtropical forest, ...
Collected most commonly using these methods or in the following microhabitats: 12 times search, 0 times On tree trunk, 1 times In gall of laurel oak, 0 times On boardwalk, 0 times Dead branch, 0 times on trunk of beech, 0 times Stump, log stage 2, 1 times Stump, log stage 4, 1 times In greenhouse, 1 times Winkler, 1 times in twig, ...
Elevations: collected from 3 - 335 meters, 97 meters average