Łukasz Krajewski, Tomasz Janiszewski, Tadeusz Musiał
Ornis Polonica 2012, 53: 175–187
https://doi.org/10.12657/ornis.2012.3.1
Abstract: The paper reports first results of the Bean Goose subspecies counts in the Łódź region during spring 2011. From over 58,300 Bean Geese observed during 21 counts in 7 different locations, 7,088 individuals were identified to the subspecies. The percentage of the Taiga Bean Geese A. f. fabalis in the Bean Goose flocks was bigger in the Warsaw-Berlin proglacial stream valley (average 32.7 %, range 0–87%) than at the Jeziorsko reservoir (average 15.3%, range 3–32%), which could be explained by different habitat preferences between subspecies. The peak of the Taiga subspecies migration fell about 2 weeks earlier than that of the Tundra subspecies A. f. rossicus. The percentages of Bean Goose subspecies in the Łódź region differed from the pattern known from Poland. Apart from the differences in the geographical distribution routes of Taiga and Tundra Bean Geese, and the different proportion of subspecies in the Łódź region may be affected by various stopover strategies – the Taiga Bean Goose spends more time at the stopover sites compared to the Tundra Bean Goose.
