slaty; interscapulars with concealed basal portion extensively white; under parts, including malar region, plain white (sometimes tinged with buffy), passing into grayish on flanks; tibial feathers black basally, extensively white terminally (the posterior side of thighs sometimes uniform black); under tail-coverts black, often (irrespective of locality) tipped or barred with white, rarely mostly white; bill black; iris carmine red; legs and feet dusky (bluish gray in life ?); length (skins), 179-205 (194); wing, 87-99 (92.1); tail, 64-79 (71); culmen, 26-31.5 (28.5); tarsus, 33-37 (34.2); middle toe, 20-23.5 (21.3).[1]
Adult female. — Above plain chestnut, darker on pileum, paler and duller on rump, the tail and primaries more brownish chestnut; loral and orbital regions dusky, passing into chestnut on auricular region; under parts (including greater part of malar region) plain white (sometimes tinged more or less with buffy), passing through pale buffy grayish into pale buffy brown or cinnamon on flanks; under tail-coverts light chestnut; thighs mixed light chestnut and buffy whitish; bill varying from horn brown to nearly black; iris carmine red; legs and feet horn color or dusky (bluish gray in life ?); length (skins), 169-220 (190); wing, 83-96 (89.4); tail, 64.5-75.5 (70.2); culmen, 25-30.5 (28.1); tarsus, 32-36.5 (34.2); middle toe, 20-23.5 (21.8).[2]
Immature male. — Similar to the adult male but wing-coverts without
white tips (the greater coverts sometimes narrowly tipped with
- ↑ Forty-seven specimens.
- ↑ Thirty-six specimens.
Locality. Wing. Tail. Culmen. Tarsus. Middle
toe.males. Three adult males from Colombia (Rio Barratoro) 92.5 73.3 27.8 34.7 21 Ten adult males from Panamá 89.6 69.9 28.1 35 22 Ten adult males from Costa Rica 93.7 71.6 29.2 35.7 22.9 Six adult males from Nicaragua 92.5 70.9 29.2 34.7 21.8 Seven adult males from Honduras 92.5 70.7 27.8 34.3 21.1 Six adult males from Guatemala 91.2 70.5 28 34.7 21.2 Five adult males from southern Mexico 93.7 72.8 29 35 21.3 females. One adult female from Colombia (Rio Lima) 88 68 25 33 21.5 Two adult females from eastern Panamá (Loma del León) 87.22 66.2 26.2 34.5 21.7 Eight adult females from western Panamá (Chiriquí) 87.3 68.9 26.3 34.4 21.2 Ten adult females from Costa Rica 91.6 70.7 29 34.6 22.5 Six adult females from Nicaragua 91 71.4 29.2 34.3 21.7 Two adult females from Honduras 86.5 67.2 28.5 33.2 21.2 Four adult females from Guatemala 87.9 72 28.4 34.6 22 Three adult females from southern Mexico 91.2 73 29.3 34.7 21.5
