Acta Zoologica Cracoviensia, 35(2) 1992

Issue:

VOL 35(2) 1992

Keywords:

Water-and-marsh birds, migrations, spring passage, autumn passage, River San, south-eastern Poland

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Migration of water-and-marsh birds in the Valley of the Middle San (South-eastern Poland)

• Przemysław KUNYSZ
• Józef HORDOWSKI

Abstract:

In 1982-1990 passages of 101 species of water-and-marsh birds were observed in the valley of the Middle San, mainly on the ponds at Starzawa and sedimentation basins at Siedliska. The migration route was found to extend along the San valley, through the Przemyska Brama (Przemyśl Gate) into the valley of the River Dniester. In autumn on the ponds at Starzawa the number of birds on passage averaged 10 000 per inspection (max. 40 000), among which Anas platyrhynchos, Fulica atra, Vanellus vanellus, Larus ridibundus and Aythya ferina were dominant, forming 95% of the group. In spring approx. 1500 birds were counted during each inspection (max. 5000); here, Anas platyrhynchos, Vanellus vanellus, Larus ridibundus, Aythya ferina, A. fuligula and Philomachus pugnax predominated and formed 80% of the group.