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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 Mixed subtropical forest, 0 times found in Tropical Hammock, 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, ...
Collected most commonly using these methods or in the following microhabitats: 12 times search, 0 times On tree trunk, 0 times On boardwalk, 0 times Dead branch, 0 times on trunk of beech, 1 times In gall of laurel oak, 0 times On live oak, 0 times Dead branch of live oak, 0 times On sea grape, 0 times Dead pine branch, 0 times Dead twig, ...
Elevations: collected from 3 - 335 meters, 97 meters average
Type specimens: syntype of Crematogaster ashmeadi: casent0902144