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Auteur W. S. Boyd |
Documents disponibles écrits par cet auteur (2)
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Article
W. S. Boyd, AuteurThe purpose of this study was to compare two survey protocols for estimating the size of Snow Goose flocks in winter. Compared to photo counts of the same flocks, visual estimates were biased low when flock size exceeded 2000 birds, and the degr[...]![]()
Article
W. S. Boyd, Auteur ; S. D. Schneider, Auteur ; S. A. Cullen, AuteurEared Grebes (Podiceps nigricollis) marked with small radio-transmitters in 1995 and 1996 at a breeding site in south-central British Columbia, Canada, were subsequently detected in fall at Mono Lake (California) and Great Salt Lake (Utah). At l[...]



