BUTASTUR. 231 



sides of face clear ashy gray ; sides of neck ashy brown, uniform with the 

 interscapuhiry region ; wing-coverts rufous-l)rown, mottled with clearer 

 rufous; primary-coverts rufous, externally mottled and broadly tipped 

 with black ; quills rufous, narrowly tipped with l)uffy white, primaries 

 brown externally and toward their tips, also barred with dark brown on 

 their inner webs ; the secondaries ashy brown, inclining gradually to whity 

 brown at their tips, washed with rufous and barred with dark brown; 

 the lower surface of the wing creamy white on the inner webs of the 

 quills, somewhat washed with rufous ; tail asliy brown, whity brown at 

 tip and crossed with three or four broad bars of blackish brown, the lower 

 surface ashy white, the bars showing more plainly, except on the outer- 

 most feather, where they are obsolete; throat white, with a mesial line of 

 ashy brown, as well as two not very distinct moustachial streaks ; upper 

 breast ashy brown, washed with rufous, the lower breast and abdomen 

 barred with white and rufous-brown, the latter bars decreasing toward 

 the vent and thighs, and totally absent on the under tail-coverts; under 

 wing-coverts with slight cross-markings of pale rufous. Bill leaden black, 

 yellow at base; cere and feet yellow; iris yellow. Length, 470; culmen, 

 33 ; wing, 333 ; tail, 201 ; tarsus, 61. 



"Adult female. — Larger. Length, 470 ; wing, 345 ; tail, 213 ; tarsus, 62. 



"Young. — Considerably different from the adult. Above dark brown, 

 the wing-coverts washed with rufous and tipped with dull white, the 

 greater ones with rufous or rufous-wiiite spots on both webs, giving a 

 mottled appearance to these parts; forehead and eyebrow creamy white; 

 crown and hind neck brown, the feathers margined with creamy white, 

 giving a striped appearance, the latter also slightly washed with rufous; 

 sides of face ashy brown, streaked with darker brown, the fore part of the 

 cheeks white; under surface of body creamy buflf, the throat with a 

 central blackish streak on the lower part ; center of chest streaked with 

 dark brown, the breast with pale chestnut, becoming spade-shaped spots 

 on the flanks, but nafrowing to small streaks on the thighs, and dis- 

 appearing altogether on the under tail-coverts, which are creamy buff; 

 under wing-coverts creamy buff, with a few rufous-brown marks on the 

 lower series, and bars of the same on the axillars ; upper tail-coverts brown, 

 white at the base and at tip, and having the outer margin also white; 

 tail ashy brown, tipped with pale rufous-brown and crossed with five 

 bars of darker brown, the subtemiinal one broader ; quills dark brown, the 

 secondaries paler, the base of the inner web white, with remains of ashy 

 bars on the inner secondaries. Cere and feet yellow ; bill black ; iris 

 yellow." (Sharpe.) 



"Exceedingly common throughout the group. Most aburfdant about 

 scattering trees in open fields. Breeds." (Bourns and Worcester MS.) 



The tic-wee buzzard is the commonest hawk in the Philippines and on 

 Calayan and Batan Islands it occurs in immense flocks during migration. 



