Brachypteryx mindanensis Mearns, Proc. Biol. Soc. Wash. (1905),
18, 3; McGregor and Worcester, Hand-List (1906), 83.
Boor-roo-win'g, Bagobos of Mount Apo.
Mindanao (Mearns, Goodfellow).
"Adult male.--Similar to the male of B. brunneiceps, but larger and
apparently less heavily washed with black on the top of the head and
throat. Belly without a trace of grayish wash present in B. poliogyna
from the Island of Luzon. Measurements of No. 192,256, U. S. National
Museum, from Mount Apo at 1,920 meters, July 4, 1904. Total length,
158; alar expanse, 220; wing, 70; tail, 62; bill from base of culmen,
14; bill from nostril, 9.5; tarsus, 33; middle toe with claw, 23. Iris
dark brown; bill, feet, and claws gray-black, darker than plumage.
"Adult female.--Similar to the female of B. brunneiceps, but differs
in addition to its larger size and relatively longer tail, in having
the abdomen washed with brownish gray. The wing-quills and spurious
wing are brown. Measurements of type: Length, 158; alar expanse, 212;
wing, 70; tail, 56; bill from base of culmen, 14; bill from nostril,
9; tarsus, 31; middle toe with claw, 24. Iris dark brown; bill, feet,
and claws dark gray.
"Young male in first plumage.--Slate-colored feathers of the adult
plumage are present in the greater wing-coverts and pectoral region
of the specimen (No. 192,257, U. S. National Museum, from Todava, at
1,220 meters, on Mount Apo, July 11, 1904). General color clove-brown,
the feathers slaty at base, all but the quills with russet shaft-spots,
which are small and triangular on the back, and so extended as to
give a general russet tone to the abdomen. Iris brown; bill and feet
gray-black. Length, 155; alar expanse, 218; wing, 70; tail, 50;
bill from base of culmen, 13; bill from nostril, 8.6; tarsus, 33;
middle toe with claw, 22.
"The name 'boor-roo-wi'ng,' used by the native Bagobos, is in
imitation of the lisping notes of this bird, which suggest sounds of
the winds." (Mearns.)