Apparent Hybrid Common Goldeneye X Barrow's Goldeneye in Minnesota With a Summary of North American Records

摘要

The first Minnesota report of a prob- able hybrid Common Goldeneye (Bucepbala clangula) X Barrow's Golden-eye (B. islandica) was an adult male studied by Mattsson and others at Point Douglas, Washington County, 1 January 2008 (The Loon 80:134). Note that the photo on p. 133 of this issue shows an adult male Barrow's Goldeneye that the photographer and the authors believe is incorrectly labeled as the hybrid. Mattsson's field notes state, "Adult. Around Noon. Sunny, cold, -15° F. Looking north about 200 m. Intermediate between both species of goldeneye. Facial disc an elongated oval narrowing slightly near top, not pointed as in Barrow's. White scap bars wider and longer than Barrow's, with less black surrounding them, and nearly reached flanks. Shoulder spur present, but less extensive than Barrow's. Head shape like Common mostly, with peak above eye. Occasionally peak forward of eye and nape became elongated and sloping as in Barrow's." Mattsson made a field sketch, but was unable to photograph the bird.