HELMINTHS FROM SOME MINNESOTA AND WISCONSIN RAPTORS

Seventy-seven hawks of 10 species (Accipiter cooperii, Accipiter stria tus, Accipiter gentilis, Circus cyaneus, Buteo lagopus, Buteo jamaicen sis, Buteo platypterus, Pandion haliaetus, Falco peregrinus, Falco spa rverius) and 49 owls of 8 species (Bubo virginianus, Strix nebulosa, S trix varia, Aegolius acadicus, Otus asio, Asio flammeus, Asio otus, Cr yptoglaux funereus) from Minnesota and Wisconsin were examined for hel minths. Echinoparyphium sp., Echinostoma trivolvis, Neodiplostomum sp. , Ribeiroia thomasi, Strigea falconis (Trematoda), Capillaria sp., Cyr nae sp., and Porrocaecum sp. (Nematoda) were common to both hawks and owls. Paruterina sp. (Cestoda) was found only in the great-homed owl. Lyperosomum sp., Parastrigea sp. (Trematoda), Centrorhynchus spinosus (Acanthocephala), Contracaecum pandioni, Microtetrameres sp., Physalop tera sp., Serratospiculoides amaculata, and Tetrameres sp. (Nematoda) were recovered from hawks. New host records include Lyperosomum sp. fr om the gall bladder of a kestrel and Ribeiroia thomasi from the proven triculi of great-homed owls and red-tailed and broad-winged hawks. The only instance of pathology was a tissue reaction to S. amaculata in t he air sacs of a Cooper's hawk.