Distribution and geographical variation of the White-tailed Hawk (Buteo albicaudatus)
Beaufortia , Volume 15 - Issue 208 p. 195- 208
The present knowledge on infraspecific variation, distribution, and migration of the White-tailed Hawk ( Buteo albicaudatus Vieillot) is critically reviewed. In practically every aspect knowledge is highly inadequate. Size variation (tables I—IV) is in accordance with Bergmann’s Phenomenon, but does not seem to form a sound basis for the current recognition of three subspecies. Intermixture of resident tropical populations (with relatively small dimensions) with migrants from the north and/or south is suspected.
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Voous, K.H. (1968). Distribution and geographical variation of the White-tailed Hawk (Buteo albicaudatus). Beaufortia, 15(208), 195–208.