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- Title
Geographical Variability of Morphological and Acoustic Signs of the North Populations of the Long Tailed Tit <italic>Aegithalos caudatus</italic> (Passeriformes, Aegithalidae).
- Authors
Lukyanchuk, O. A.; Marova, I. M.; Redkin, Ya. A.
- Abstract
The geographic variability of the morphological and bioacoustic characteristics of the long-tailed bushtit, or long-tailed tit (<italic>Aegithalos caudatus</italic>), was studied, and the validity of the selection of the controversial subspecies <italic>Ae c. japonicus</italic> Prazak 1897 was evaluated., Ae. c. brachyurus Portenko 1954 and <italic>Ae. c. sibiricus</italic> (Seebohm 1890), distributed from Scandinavia and Eastern Europe to the Pacific coast. On the basis of a study of nine metric characters and three signs of coloration, we showed that in the space of the range of white-head long-tailed tits from Eastern Europe and Scandinavia to Primorye and Sakhalin, the majority of morphological characters slightly fluctuate or change in a clinal mode; i.e., they change gradually. The vocalization of the nominative subspecies of long-tailed tits is analyzed for the first time. When comparing samples from neighboring regions, no significant differences were revealed, either morphologically and acoustically, so the names <italic>Ae. c. sibiricus</italic> and <italic>Ae. c. brachyurus</italic> should be synonymous with the nominative subspecies <italic>Ae. c. caudatus</italic>. Only the populations of long-tailed tits of the southern Kuril Islands and Hokkaido Islands can be isolated as an independent subspecies <italic>Ae. c. japonicus</italic>.
- Subjects
LONG-tailed tit; BIRD morphology; GEOGRAPHICAL distribution of birds; BIRD vocalizations; BIOACOUSTICS
- Publication
Biology Bulletin, 2017, Vol 44, Issue 9, p1081
- ISSN
1062-3590
- Publication type
Article
- DOI
10.1134/S1062359017090060