SEEN - SE European Bird Migration Network
Directional preferences of the Reed Warbler (Acrocephalus scirpaceus) in western Ukraine

Oksana Zakala1, Ludwik Maksalon2 & Krzysztof Dudzik2

1 Western Ukrainian Ornithological Station, Zoological Museum, Lviv University, Ukraine
2 Bird Migration Research Station, University of GdaƄsk, Poland

We studied directional preferences of the Reed Warbler in the “Cholginsky” ornithological reserve (western Ukraine) during August 2005. Birds were captured with using mist-nets in reed beds of Phragmites australis. Data collection and processing were made following to Busse (2000). Out of 496 tests for orientation of Acrocephalus warblers, 149 (30%) were held with Acrocephalus scirpaceus. In total, 39 adult and 110 young birds were tested. Out of 149 orientation experiments with Reed Warbler, in 135 of them the directional preference was significantly different from the random.
The Reed Warbler during autumn migration in 2005 chose SSW direction (36.8%), SE direction (34.1%) and SW (29.1%). The young Reed Warblers chose all three directions almost equally, the adult birds preferred SW and SE directions.
Of the 149 analysed individuals, 80.0% chose one direction, while 20.0% two or more directions. In the first group, 36.0% of birds chose SE direction. It was found that most part of young birds chose just one direction (81.5%), while most part of adults two or more directions (25.9%).
Recovery data support the existence of SW directions during the autumn migration. The birds ringed in western Ukraine were caught in Spain, Slovenia (two birds), France, Hungary, and Croatia. We also caught two birds ringed in Spain. There are no recoveries from western Ukraine, which can support the migration of Reed Warblers in the SE direction, but a bird ringed in Turkey was caught in southern Ukraine in spring 2004. This information supports migration of the Reed Warbler in Ukraine also in SE direction.

Created by Pronetix 2006