Cerchneis vespertina, Lin.
19. :- Jerdon's Birds of India, Vol. I, p. 41. 19 bis. :- Butler, Deccan; Stray Feathers, Vol. IX, p. 371; Hume's Scrap Book, p. 106.
THE RED-LEGGED FALCON.
Length, 11; wing, 8.75.
Length, 11.5; wing, 9.25 ; expanse, 27; tail, 5. Bill fleshy-red, with a dusky tip ; cere and legs deep orange-red ; claws fleshy; orbitar skin orange-yellow.
Young bird: above dark slaty-grey, some of the feathers centred and tipped darker; tail light grey, obsoletely barred; ocular region and cheek-stripe nearly black; narrow frontal band, supercilium, lores, ear-feathers, and sides of neck and throat white; breast and abdomen rusty-white, with blackish-brown marks, longitudinal on the breast, heart-shaped on the sides, and arrow-like on the centre of the abdomen ; vent, under tail-coverts, and thigh-coverts pale unspotted rusty.
The adult male has the whole upper' plumage unspotted ashy, pale ashy beneath; chin and throat whitish; wings dusky-black ; thigh-coverts, and under tail-coverts, bright rusty-red.
Dr. Jerdon remarks that the Red-legged Falcon is not common in India, but that he has killed it in Central India ; it is nearly certain that he mistook it for 19 bis, Cerchneis amurensis, Radde. This latter Major Butler procured at Belgaum. The points of difference are as follows: :-
Under wing-coverts and axillaries.
Bluish-grey. Pure white.
ADULT. Under surface.
Rufous, either uniform or with slight remains of blackish shaft lines.
Creamy-white; the breast broadly streaked and the flanks barred with black; abdomen, thighs, and under tail-coverts uniform pale rufous.
Rufous with narrow shaft lines of black; forehead whitish; under surface of body buff, streaked down the centres of the feathers with brown ; no bars on the flanks; tail bluish.
Dark bluish, with black shaft streaks; forehead fulvous ; un¬der surface of body buff, broadly streaked with black on the chest and barred on the flanks with the same color; tail bluish.