“Habits like those of H. semigaleatus. Eyes yellow to brown in female, light bluish gray in male; legs and feet red; bill scarlet on basal half, rest yellowish white; bill of young birds black. A male measures 927 in length; wing, 393; tail, 312; tarsus, 54; middle toe with claw, 66.” (Bourns and Worcester MS.)
291. HYDROCORAX SEMIGALEATUS (Tweeddale).
INTERMEDIATE CALAO.
- Buceros semigaleatus Tweeddale, Proc. Zool. Soc. (1878), 279.
- Hydrocorax semigaleatus Grant, Cat. Birds Brit. Mus. (1892), 17, 360; Sharpe, Hand-List (1900), 2, 64; McGregor and Worcester, Hand-List (1906), 55.
Cao, Bohol.
Bohol (McGregor); Leyte (Everett, Steere Exp., Whitehead); Panaon (Everett); Samar (Steere Exp., Bourns & Worcester, Whitehead).
Adult.—Colors of plumage as in the two preceding species, colors of bill as in H. mindanensis, but the casque abruptly contracted in front and its upper outline, in front, continuous with that of the culmen. “Naked skin round eye darkest sepia, almost black; gular skin dark indian-yellow; iris light yellow (light green in living bird); feet coral-red; nails dark brownish gray.” (Everett.) Length of male, about 890; wing, 400; tail, 320; bill from nostril, 153; greatest width of casque, 53; tarsus, 53.
“Adult female.—Does not differ in plumage from the male. Length, 787; wing, 350; tail, 279; tarsus, 53.
“Young.—Similar to that of H. mindanensis, except that the outer tail-feathers have not the basal half chestnut, although the middle feathers are the same.
“In older examples of both sexes, when the adult plumage has been nearly attained the bill is jet-black, the yellow tip of the young having disappeared, and the anterior part of the casque is distinctly raised above the line of the culmen.” (Grant.)