Falco subbuteo.

Falco subbuteo.

The Hobby has been much split up by various authorities and the latest, Kirke-Swann, recognizes four Asiatic and European races, F. s. subbuteo, Europe and in Winter to India; centralasiae, from Central Asia, jarkutensis (—satwattts) from E. Asia and streichi, a small form breeding in South China. Its small size suffices to distinguish streichi from the other three but these latter are very hard to distinguish from one another. With large series it, however, seems possible to pick out from birds killed in the breeding-season, first, birds from Central Asia averaging larger and paler than European specimens and, secondly, a few Eastern (presumably) breeding-birds which are somewhat darker and which average in measurement between these two. For the present,, therefore, I accept the four races, all of which are found within our limits.

Key to Subspecies.

A.Larger; wing over, 240mm.; 270 mm.
A.Darker..............................F. s. jarkutensis, p. 44.
B.Intermediate, but nearer F. s. jarkutensis................F. s. subbuteo, p. 42.
c.Paler .............................................F. s. centralasiae. 43.
B.Smaller; wing, under, 240 mm., 270 mm................F. s. streichi, p. 44.

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: 
Falco subbuteo.
Book Author: 
Edward Charles Stuart Baker
Year: 
1928
Page No: 
41
M_ID: 
11334
M_CN: 
Eurasian Hobby
M_SN: 
Falco subbuteo
Volume: 
Vol. 5
Term name: 
id: 
4316

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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