FALCO. 419 



1257. Falco jugger. The Layyar Falcon. 



Fftlco jugger, J. E. Gray in Hardw. III. Ind. Zool ii, pi. 26 (1833-34) : 

 Blyth, Cat. p. 13 ; Horsf. $ M. Cat. i, p. 20 ; Jerdon, B. I. i, p. 30 : 

 Hume, Rough Notes, p. 70 ; A. Anderson, P. Z. S. 1871, p. 680 ; 

 Stohczka, J. A. S. B. xti, pt. 2, p. 230; Hume, S. F. i, p. 156; 

 Sharpe, Cat. B. M. i, p. 393 ; Butler, S. F. iii, p. 443 ; ix, p. 370 ; 

 Davidson Sf Wend. S. F. vii, p. 73; Ball, ibid. p. 196; Cn'/>/><, 

 ibid. p. 241 ; Hume, Cat. no. 11 ; Scully, S. F. viii, p. 222 ; Reid, 

 S. F. x, p. 3 ; Barnes, Birds Bom. p. 12 ; id. Jour. Bom. N. H. 

 Soc. iii, p. 209 ; Hume, S. F. xi, p. 3 ; St. John, Ibis, 1889, p. 151 ; 

 Oates in Hume's N. $ E. 2nd ed. iii, p. 186. 



Falco Luflgor, Jbttoii, Madr. Jour. L. S. x, p. 80 (1839) ; id. III. Ind. 

 Orn. pi. xliv. 



Falco thermophilus, Hodgson in Gray's Zool. Misc. p. 81, descr. 

 nulla. 



Laggar $, Jaggar rf, H. ; Lagadu, Tel. 



Fig. 100. Head of F. jugger, |. 



Coloration. Adult. Forehead, lores, and supercilia white, with 

 'dark streaks ; crown and nape brown, with broad rufous edges to 

 the feathers ; a streak running back above the ear-coverts, and a 

 moustachial band from the gape sometimes continued to the eye, 

 with some feathers round the orbit dark brown ; rest of sides of 

 head white, with a few dark shafts beneath the eye; upper 

 plumage from the nape brown with an ashy tinge; quills the 

 same ; inner webs of primaries, except near the end, with broad 

 white bars ; tail brown, middle feathers unbarred and pale-tipped, 

 outer feathers with whitish bars on the inner webs and white tips ; 

 lower parts white, a few dark streaks, wanting in very old birds, 

 on the breast, and spots on the abdomen ; flanks and outer thigh- 

 coverts chiefly brown. 



Young birds are brown almost throughout, the chin and throat 

 white, and some white on the forehead, sides of head, breast, and 

 lower tail-coverts, buff instead of white on quills and inner webs 

 of tail-feathers. There is a gradual disappearance of the brown 

 on the lower parts with successive moults. 



Bill greyish blue, the tip blackish; cere yellow in adults, 

 greenish grey in young birds ; irides dark brown ; legs and feet 

 yellow, pale plumbeous to dull greenish grey in the young (Hume). 



Length of female about 18 inches ; tail 8 ; wing 14 ; tarsus 2; 

 mid-toe without claw 1-8; bill from gape 1-25: of a male, length 

 16 ; tail 7-5 ; wing 12-5. 



