Cliff Davies1,2, Helga Fischer1, Eberhard Gwinner1,3
1Max-Planck-Institut für Verhaltensphysiologie Seewiesen und Erling-Andechs (Obb.), Deutschland.
Captive geese bred seasonally like wild birds, but earlier. Hybrid geese showed intermediate breeding times, suggesting genetic influences on avian breeding seasonality.
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