611. Cypselus pekinensis

611. SUBSP. CYPSELUS PEKINENSIS.
Cypselus pekinensis, Swinhoe, P.Z.S. 1870, p. 435 : David and Oust. Ois. Chine, p. 68 ; (Hartert) Cat. B. Br. Mus. xvi. p. 444.
ad. (Siberia). Differs from C. upas only in being rather paler on the upper parts, especially on the forehead, and to some extent also on the tail.
Hab. E. Siberia, Mongolia, eastern Central Asia, and China.
Does not differ from C. apus in habits or nidification except that it nests in hollow trees as often as in rocks or buildings, whereas C. apus seldom builds in hollow trees ; and its note is said to be softer.

BookTitle: 
A Manual Of Palaearctic Birds
Reference: 
Dresser, Henry Eeles. A Manual of Palaearctic Birds. Vol. 1. 1902.
Title in Book: 
611. Cypselus pekinensis
Book Author: 
H. E. Dresser
CatNo: 
611
Year: 
1902
Page No: 
428
M_ID: 
7726
M_SN: 
Apus apus pekinensis
Volume: 
Vol. 1
Term name: 
id: 
10957

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