Orange-breasted falcon

Male orange-breasted falcons are 35 to 36 cm (14 to 14 in) long and weigh 325 to 425 g (11 to 15 oz). Females are 38 to 40 cm (15 to 16 in) long and weigh 550 to 700 g (19 to 25 oz). Of all the falcons, this species has the greatest difference in size between the sexes. It is a rather husky, large-headed, bird. The sexes have similar plumage, and the species resembles the smaller bat falcon. Adults have a black head and bluish black upperparts with paler blue-gray edge on the feathers. Their throat and sides of the neck are white and their upper breast is buffy rufous orange that also extends onto the sides of the neck. The ratio of white to orange varies among individuals. Their lower breast is black with coarse reddish brown bars, somewhat lighter on the flanks. Their belly, thighs, and undertail coverts are the same buffy rufous orange as the upper breast. Their cere, the bare skin around the eye, and their legs and feet are usually bright yellow, but may be pale yellow to dull bluish green. Their iris is dark brown. Immatures are paler and less sharply marked than adults. Their back and tail are dark brownish, their underparts mostly pale buffy with dark brown barring on the breast. Their bare parts are dull bluish green that become more yellow with age.