Published online by Cambridge University Press: 31 May 2012
Ceratophyllus swansoni Liu, 1935, was described from one male and one female specimen collected from a long-eared owl, “Asio wilsonianus” [A. otus ssp.], at Fertile, Minnesota. The species is not well known in collections, and the writer knows of only one other published record, from Beaverhead Co., Montana, reared from nests of the same owl (Jellison et al., 1943). The host affinities of C. swansoni have remained uncertain, as predatory birds are not usually normal hosts of fleas.