Acta Zoologica Cracoviensia, 43(1-2) 2000

Issue:

VOL 43(1-2) 2000

Keywords:

Raven, non-breeding flocks, foraging places

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Assemblages of non-breeding Ravens Corvus corax Linnaeus, 1758, in Wielkopolska (W Poland) in the period of recolonisation of this region

• Jan BEDNORZ

Abstract:

In the period of recolonisation of the Wielkopolska region by the Raven, floks of juvenile birds started appearing a few years later with respect to the increase in the size of the breeding population. Most often the flocks were observed at the turn of the winter and spring or in the summer and autumn. The most often seen flocks ranged from 21-40 individuals. The flocks o f non-breeding birds were foraging mostly in arable fields and at waste dumping sites of slaughterhouses. Only in these rich of food sites, flocks of over 100 individuals were observed.