Cohabitation and nest-site selection of Common Swift (.Apus apus) and Pallid Swift (A. pallidus)

Content Provider	Semantic Scholar
Author	Antonov, A. Atanasova, Darina
Copyright Year	2015
Abstract	Antonov, A., & D. Atanasova (2002): Cohabitation and nest-site selection of Common Swift (Apus apus) and Pallid Swift (A. pallidus). Vogelwarte 41: 231-239. This study explored colony pattern, interspecific association and nest-site selection of two closely related spe­ cies o f swift, Common Swift (Apus apus) and Pallid Swift (A. pallidus) in Sofia city, Bulgaria. The numbers and locations o f nests were determined by the newly devised method of „excrement watching“ but also supple­ mented with the classic „building mapping“ method. The Common Swift population (1147 pairs) was nearly 4 times larger than the Pallid Swift population (304 pairs). Common Swift colonies were o f a wider range of sizes (3-34 pairs vs. 3-11 in Pallid Swift), but in both species small colonies predominated. Most pairs o f both species bred in monospecific colonies, but a greater proportion of the Pallid Swift population nested in mixed colonies. In both species nest-site selection took place with preference for north and east facing situations. Most pairs in both species nested in the eaves o f buildings but Pallid Swift was less specific in its choice o f nest-sites, utilizing a wider range of heights, and occupying the whole range o f recorded nest-cavity types. Pallid Swift was suggested to have colonized the city after Common Swift and initially associated more strongly with the latter.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.zobodat.at/pdf/Vogelwarte_41_2002_0231-0239.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article