Acanthopneuste borealis

Key to Subspecies.

A. Head and back the same olive-green;
first primary generally under 11 mm…..A. b. borealis, p. 472.
B. Head more grey and darker than back;
first primary generally over 11 mm……A. b. xanthodryas, p. 472.

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.2 1924.
Title in Book: 
Acanthopneuste borealis
Book Author: 
Edward Charles Stuart Baker
Year: 
1924
Page No: 
472
M_ID: 
23025
M_CN: 
Arctic Warbler
M_SN: 
Phylloscopus borealis
Volume: 
Vol. 2
id: 
3545

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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