(1973) Alectoris graeca koriakovi.
THE PERSIAN CHUKAR.
Caccabis kakalik koriakovi Zarudny, Men. Orn., p, 55 (1914) (E. Persia.). Caccabis chucar. Blanf. & Oates, iv, p. 131 (part.).
Vernacular names. None recorded.
Description. Differs from the preceding bird in having the whole plumage rather paler and brighter, the red-brown and the crown and pinky-red upper back being conspicuously so ; the breast is generally a clearer purer grey.
Colours of soft parts as in the Chukar.
Measurements. "Wing 140 to 156 mm.
Distribution. Eastern Persia to Baluchistan and Sind. I do not think Hartert's H. g. kirthari is separable from this form now that we have larger series of: the various races for comparison.
Nidification. This race of Chukar breeds between 5,000 and 12,000 feet in Persia and Baluchistan. In Quetta Betham took its eggs in June but it lays as early as the first week of April in other parts of Baluchistan, whilst in Persia it breeds from the end of April to June. Nest and site are much like those of the last bird and the number of eggs laid varies from eight to eighteen and cannot be distinguished from those of the Indian Chukar, though they average paler and smaller. Fifty eggs average 39.0 x 29.3 mm.: maxima 43.0 x 30.2 and 42.3 x 31.5 mm.; minima 35.2 x 28.2 and 38.0 x 26.4 mm.
Habits. Those of the genus.