"The general color of the upper surface in this species is a dark umber-brown; but the base of the feathers of the crest is white and the margins of the other occipital feathers are of a light yellowish brown. Some of the scapulars and other alar feathers (especially the latter) are slightly tipped with the same; the tail, which is of a somewhat lighter brown than the back, is tipped with a very narrow edging of white, and is also crossed by seven blackish brown bars, the upper one, however, being somewhat indistinct, and the two lower being separated by an interval which is twice the breadth of the spaces between the other bars. The throat has a broad blackish band running down the center, with two similar and nearly parallel bands proceeding from the corners of the mouth, the three bands all merging in a cluster of dark brown lanceolate marks upon the upper portion of the breast, the intervals between these markings, and also the whole sternal and abdominal regions, being tinged with a yellowish rufous; the under tail-coverts are barred with brown and white, the former bars being much broader than the latter; and the thighs and tarsi are marked throughout their length with narrow, equidistant, transverse bars of the same color. Length, 635; crest, 63; wing, 375; tail, 292; tarsus, 89; middle toe with claw, 76." (Sharpe.) A rare species found only in forest. A male from Lubang measures: Length, 610; wing, 390; tail, 250; culmen from base, 38; tarsus, 97. 184. SPIZAËTUS LIMNÆËTUS (Horsfield). CHANGEABLE HAWK EAGLE. Falco limnæëtus Horsfield, Trans. Linn. Soc. (1821), 13, pt. 1, 138. Spizaetus limnaetus Sharpe, Cat. Birds Brit. Mus. (1874), 1, 272. Spizaëtus limnaëtus Sharpe, Hand-List (1899), 1, 264; Oates, Cat. Birds' Eggs (1902), 2, 274; McGregor and Worcester, Hand-List (1906), 42. Calamianes (Bourns & Worcester); Lubang (McGregor); Mindanao (Platen); Mindoro (Everett); Palawan (Whitehead, Platen). Burmese provinces, Malay Peninsula, northeastern Bengal, Greater Sunda Islands, Assam, and the Himalayas. "Adult.--Above and below deep chocolate-brown, inclining to blackish on the head and back, the quills and tail blackish, the shafts of the latter brownish, the inner webs of the quills clear ashy; tail-feathers below ashy white, brownish toward the tips, the penultimate ones with remains of irregular cross-markings. Cere yellowish; feet pale yellow; iris bright yellow. Length, 635; culmen, 43; wing, 406; tail, 279; tarsus, 104.