Delichon urbica.

Key to Subspecies.

A. The longer upper tail-coverts black.
a. Lower plumage pure white…………D. u. urbica, p. 226.
b. Lower plumage smoky or greyish-white…………D. u. cashmeriensis, p. 228.
B. The longer upper tail-coverts white…………D. u. whiteleyi, p. 229.

BookTitle: 
The Fauna Of British India, Including Ceylon And Burma-birds(second Edition)
Reference: 
Baker, EC S (1922–1930) The fauna of British India including Ceylon and Burma. Second edition. vol.3 1926.
Title in Book: 
Delichon urbica.
Book Author: 
Edward Charles Stuart Baker
Year: 
1926
Page No: 
226
M_ID: 
22561
M_CN: 
Common House Martin
M_SN: 
Delichon urbicum
Volume: 
Vol. 3
Term name: 
id: 
3973

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith