Chimney swifts feed exclusively while in flight. They are primarily insectivores (Palmer and Fowler, 1975). They forage by hovering over tree branches and catching insects in flight; they take a variety of insect and spider prey. Forty to fifty chimney swifts were recorded hovering at the outer branches or diving through the top branches of a sweetgum tree in pursuit of a particular species of weevil (Chantler and Driessen, 2000). (Chantler and Driessens, 2000; Palmer and Fowler, 1975)
- Chantler, P., G. Driessens. 2000. Swifts: A Guide to the Swifts and Treeswifts of the World, 2nd. ed. Sussex: Pica Press.
- Palmer, E., H. Fowler. 1975. Fieldbook of Natural History, 2nd ed. New York: McGraw-Hill, Inc.