44. BIRDS OF LA PLATA 
and to pursue and strike“f€ down with its claws. 
Mr. Gibson’s account of its habits agrees with mine, 
and he says that “it will raise any small bird time 
after time, should the latter endeavour to conceal 
itself in the grass, preferring, as it would seem, to 
strike it on the wing.”” He further says: “ Its 
flight is low and rather rapid, while if its quarry 
should double it loses no ground, for it turns some- 
thing in the manner of a Tumbler Pigeon, going 
rapidly head over heels in the most eccentric and 
amusing fashion,” 
Probably this Harrier has a partial migration, as 
a great many are always seen travelling across the 
pampas in the autumn and spring ; many individuals, 
however, remain all the winter. 
The nest is made on the ground among long grass, 
or in reed-beds in marshy places, and the eggs are 
white, blotched with dark red. 
VOCIFEROUS HAWK 
Asturina pucherani 
Above dark brown; upper tail-coverts fulvous, barred with brown; 
wings chestnut barred and broadly tipped with black; tail fulvous, 
crossed with four black bars; beneath pale ochraceous, barred with 
rufous; bill black, feet yellow; length 18 inches. Female larger, 
THis brown-plumaged, short-winged, and exceed- 
ingly vociferous Hawk is common in the woods 
along the shores of the Plata and its tributaries, and 
is never found far removed from water. It perches 
