Comprehensive Description
provided by Smithsonian Contributions to Zoology
Vermivora chrysoptera (Linnaeus)
A nest of this warbler containing 3 eggs of the host and 1 of the brown-headed cowbird, found on Little George Island, in Lake Winnipeg, Manitoba, 5 July 1971, reported by Houston (1971:872), is the first record of this species as a victim of the northwestern cowbird, M. ater artemisiae. The nominate race of the parasite was previously reported as imposing on the golden-winged warbler only occasionally; a total of 17 instances up to 1963 (Friedmann, p. 93) had been recorded. To these may be added 19 more: 2 from Massachusetts (from Malden and Bradford), now in the collections of the Western Foundation; 9 from New York (Bull (1974:537) lists 11 cases, 2 of which were included in our earlier figures); and from Ontario, 8 out of 22 nests reported (Ontario Nest Records) an incidence of 36.4 percent.
BLUE-WINGED WARBLER
- 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
