Differences in Winter Range among Age-Sex Classes of Snowy Owls Nyctea scandiaca in North America

Autor:	Kerlinger, Paul, Lein, M. Ross
Zdroj:	Ornis Scandinavica (Scandinavian Journal of Ornithology), 1986 Mar 01. 17(1), 1-7.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/3676745 Zobrazit plný text záznamu