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Documents disponibles écrits par cet auteur (4)
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Ouvrage
Peter Pyle, Auteur ; Steve N. G. Howell, Auteur ; Siobhan Ruck, Auteur | Bolinas (Calif.) : Slate Creek Press | 2008This compendium provides detailed information on identifying, ageing, and sexing waterbirds, diurnal raptors, and gallinaceous birds in the hand. While of primary utility to banders, the wealth of information is of interest to both birdwatchers [...]
Ouvrage
A greatly expanded revision to Identification Guide to North American Passerines. A synthesis of known and new information on identification, geographic variation, molt, ageing, and sexing landbirds in the hand and the field. 395 species treated[...]
Article
Steve N. G. Howell, Auteur
Article
Dick Newell, Auteur ; Steve N. G. Howell, Auteur ; Daniel Lopez-Velasco, AuteurThe plumages and moult cycles of immature large skuas are poorly known, and some first-year Great Skuas Stercorarius skua can closely resemble some South Polar Skuas S. maccormicki. The most challenging birds are dark individuals in August Octob[...]
