Timing of breeding and offspring number covary with plumage colour among Gyrfalcons Falco rusticolus

Plumage colour variation exists among Gyrfalcons throughout their Arctic and sub‐Arctic circumpolar distribution, ranging from white through silver and grey to almost black. Although different colour variants coexist within many populations, a few geographical regions, such as northern Greenland, po...

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Veröffentlicht in:Ibis (London, England) England), 2013-01, Vol.155 (1), p.177-188
Hauptverfasser: Johnson, Jeff A., Burnham, Kurt K.
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Sprache:eng
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