SEEN - SE European Bird Migration Network
Directional preferences of Passerines caught during autumn migration at Kizilirmak Delta, Northern Turkey
Kiraz Erciyas1, A. Cemal Özsemir(1), Y. Sancar BariƟ(1), Jarek Nowakowski(2)
1) Ondokuz Mayis University Ornithological Research Center, Kurupelit Samsun, Turkey
2) Bird Migration Research Station, University of Gdansk, Poland

There is a general assumption that birds are able to find their way towards a goal or home position using a bicoordinate navigation system. However, the environmental variables constituting the navigatory coordinates have not yet been studied very well. In 2004, in two localities (Cernek -  41°36'N  36°05'E and Karabogaz - 41°37'N  35°46'E) at Kizilirmak Delta, Northern Turkey, Samsun, total 1 506 birds were tested with the Busse’s method (Busse 1995) for directional behaviour.
The data demonstrated that the birds’ headings were grouped in two main axes. Birds in Cernek show mainly SW, and birds in Karabogaz show mainly SE direction. Both directions recorded lead to the Kizilirmak valley, which penetrates the coastal mountain belt in the North-South direction. Our results suggest that orientation experiments show directional preferences related to the local topography / conditions.
Created by Pronetix 2006