Distribution and nature of Motacilla species presence in the southeast of Western Siberia (the Kuznetsk-Salair mountain area)

Abstract

Работа выполнена при поддержке гранта РНФ 14-50-00029 «Научные основы создания национального банка-депозитария живых систем». Our research is based on the results of catchings with the subsequent girdling from 2008 to 2014 at Azhendarovo Biological Research Station of Kemerovo State University located in the valley of the middle reaches of the Tom River (54 о 45'N; 87 о 02' E). We caught 761 Motacilla individuals during this period. To evaluate the distribution of forms, we used the collection funds of the Zoological Museum of Tomsk State University, the Department of Biodiversity and Bioresources of Kemerovo State University, and the Zoological Museum of Moscow State University, in total 111 specimens. No bird was harmed during this research. All counts were conducted according to Ethical Standards. M. flava and M. tschutschensis. M. flava beema nests in the territory of the Kuznetsk-Salair mountain region and in the basin of the Tom River. Usually, the most massive movements of M. flava beema begin in the second decade of July and reflect juvenile migrations of the nesting wagtails. The peak of flight occurs in the third decade of July. The increase in migratory activity since the end of August is probably due to a small number of M. tschutschensis plexa in the flight. The spring flight of "transit" M. tschutschensis plexa happens in the second half of May. M. flava beema arrives at the end of April-May. M. citreola and M. (citreola) werae. M. werae werae nests in the Kuznetsk-Salair mountain region, nesting of M. citreola citreola requires factual confirmation. M. werae migrates to places of winterings at the end of July-the first half of August, M. citreola citreola-in August or in the beginning of September. In spring, the first M. werae are noted in the second decade of May, and passing M. citreola are recorded in the last decade of May-in the beginning of June. M. cinerea arrives in the third decade of April or in the beginning of May. The most massive flying to the places of winterings took place in the third decade of July-in the first decade of August. The most recent capture was registered on September 15, 2008. We did not reveal any significant differences in terms of departure of adult and young individuals. M. alba and M. personata. A border between the habitats of M. alba and M. personata lies in the Kuznetsk-Salair mountain region. M. alba is common in plains, whereas M. personata is widespread in mountain and foothill territories. Both species, which actively hybridize with each other, live in the valley of the Tom river. The width of the zone, where hybrid individuals are constantly encountered, makes up about 60 km; in the zone up to 150 km the presence of hybrid individuals is already a relative rarity. The article contains 3 Tables, 8 Figures, 49 References.

The Autumn Migration of the Citrine Wagtail, Motacilla Citreola, in the Lviv Region (W. Ukraine) During its Range Expansion

“…In Western Siberia (southern part), juvenile birds form a small aggregation in early August and gradually fly away by the beginning of September (Vasylchenko 2005). In the south-eastern part of Western Siberia M. c. werae flies to its winter quarters from the end of July to the first half of August, and M. c. citreola (apparently migrants are represented only by individuals of northern populations) pass noticeably later, mainly from August to early September (Kovalevskiy et al 2017). The last migrating Citrine Wagtails in central Ukraine were recorded from 28 August to 9 September (Lyubushchenko and Tabachyshyn 1996).…”

“…Wing length is a good indicator for distinguishing subspecies of the Citrine Wagtail. According to Redkin's measurements (Kovalevskiy et al 2017) of 220 individuals, THE RING 42 (2020) 45 the wing length of M. c. citreola males is usually more than 84.5 mm, while that of females is > 78.4 mm. The wing length of M. c. werae males is usually less than 85.0 mm, and that of females is < 80.3 mm.…”