Neohierax insignis.

Key to Subspecies.

A.Back very dark grey, contrasting strongly with pale grey head in and pale rufous head in ............... N. i. insignis, p. 56.
B.Back duller and paler and showing but little contrast with head in or in depth of colour with ............... N.i. cinereiceps, p. 57.

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.5 1928.
Title in Book: 
Neohierax insignis.
Book Author: 
Edward Charles Stuart Baker
Year: 
1928
Page No: 
56
M_ID: 
11240
M_CN: 
White-rumped Falcon
M_SN: 
Polihierax insignis
Volume: 
Vol. 5
id: 
4335

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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