Sterna hirundo.

Sterna hirundo.

Key to Subspecies.

A. Bill and legs red.
a. Purer grey above and below and distinctly paler below in breeding plumage……………S. h. hirundo, p. 129.
b. Browner grey above and below and decidedly darker below in breeding plumage……………S. h. tibetana, p. 130.
B Bill and legs black ……………S. h. longipennis, p. 131.

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.6 1929.
Title in Book: 
Sterna hirundo.
Book Author: 
Edward Charles Stuart Baker
Year: 
1929
Page No: 
129
M_ID: 
4650
M_CN: 
Common Tern
M_SN: 
Sterna hirundo
Volume: 
Vol. 6
Term name: 
id: 
4922

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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