Comprehensive Description
provided by Smithsonian Contributions to Zoology
Catharus guttatus (Pallas)
The subspecies C. guttatus sequoiensis had been previously reported as a victim of the brown-headed cowbird but once (Friedmann, 1963:75, at which time the record was erroneously referred to the race C. guttatus polionotus). Two additional records are in the collections of the Western Foundation; they are, like the first one, from Mono County, California—10 June 1936 and 12 June 1950, respectively. Bull (1974:537) reports a surprising 16 instances of parasitism in New York State on the eastern hermit thrush, C. guttatus faxoni; 14 of these are additions to our earlier records. From Ontario (Ontario nest records files, Toronto), come another 5 instances out of 84 nests reported, an incidence of parasitism of 6.0 percent in that province.
SWAINSON'S THRUSH
- bibliographic citation
- Friedmann, Herbert, Kiff, Lloyd F., and Rothstein, Stephen I. 1977. "A further contribution of knowledge of the host relations of the parasitic cowbirds." Smithsonian Contributions to Zoology. 1-75. https://doi.org/10.5479/si.00810282.235
