Genus CYPSELUS

The true Swifts have the toes as a rule all directed forward, but the first or hinder toe is reversible. They are birds of powerful flight, though inferior in this respect to Chaetura. All make nests attached to rocks or buildings, or very rarely to trees.

Key to the Species.

a. No white on rump.
a1. Abdomen white……………….C. melba, p. 164.
b1. Abdomen brown.
a2. General colour blackish brown……………….C. apus, p. 165.
b2. General colour greyish brown……………….C. murinus, p. 166,
b. A white band across rump,
c1. Tail deeply forked.
c2. Larger : wing 7……………….C. pacificus, p. 167.
d2. Smaller: wing 6……………….C. leuconyx, p. 167.
d1. Tail even or nearly even.
e2. Lower tail-coverts greyish brown, paler than abdomen……………….C. affinis, p. 168.
f2. Lower tail-coverts blackish brown like abdomen ……………….C. subfurcatus, p.169,

BookTitle: 
The Fauna Of British India including Ceylon and Burma
Reference: 
Blanford, William Thomas, ed. The Fauna of British India: Including Ceylon and Burma. Vol.3 1895.
Title in Book: 
Genus CYPSELUS
Book Author: 
William Thomas Blanford
Year: 
1895
Page No: 
164
M_ID: 
7705
M_SN: 
Tachymarptis
Volume: 
Vol. 3
Term name: 
id: 
1487

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