Emigration Behavior of Clark's Nutcracker

Eruptive movements of the Clark's Nutcracker (Nucifraga columbiana) were observed during the late summer and fall of 1977, 1978 and 1979 in northern Utah and adjacent states. Over 2,000 emigrating nutcrackers were seen during these periods. Eruptions began in mid to late August, about the time...

Ausführliche Beschreibung

Bibliographische Detailangaben

Veröffentlicht in:	The Condor (Los Angeles, Calif.) Calif.), 1981-05, Vol.83 (2), p.162-170
Hauptverfasser:	Stephen B. Vander Wall, Hoffman, Stephen W., Potts, Wayne K.
Format:	Artikel
Sprache:	eng
Schlagworte:	Birds Breeding Conifers Crackers Emigration Flocks Food availability Foraging Observation wells Summer
Online-Zugang:	Volltext
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