BurNs—On BrROAD-WINGED HAWK. 269 
are unmercifully driven out of the adults territory the follow- 
ine spring, should they attempt to invade it. Parental care 
does not survive the winter's frost. 
DiIspeosirIon oF THe NeEStLING—The spirit of adventure and 
acquisition which leads men to oological fields, fails to attract 
many to the equally important study of the young; therefore | 
am compelled to rely almost wholly upon my own data in this 
respect. I] appreciate the fact that in viewing the beautifully 
painted shell ruined by the struggling chick, the feelings of the 
oologist are akin to those of the orderly collector of skins ob- 
serving the plucking of the feathers of a rare bird; or the 
photographer, seeing the bird he is about to picture, fall be- 
fore the gun of a sportsman. i 
The chick utters a peeping cry as soon as out of the shell 
and appears hungry as soon as its down has dried. | have 
seen it turn its head and bite at my thumb, when less than a 
day old. For some days the adults dismember the food and » 
the young soon learn to snatch it piecemeal from their beaks. 
When from five to eight days old it sits erect and its mouth 
flies open at every sound; it is able to disgorge a pellet the 
size of a hazelnut, scratch itself and behave as' well to its mates 
as the best tempered of birds. 
DEVELOPMEN?T OF JUVENILE PLUMAGE 
The young upon 
hatching June 3, 06, was well covered with white down, eyes 
and hill blue-black, cere very pale yellow, feet, tarsi and edge 
of mouth flesh color; and eight days later the feet and tarsi 
were the palest possible flesh tint with incipient yellow cast, 
and the talons blue-black. Another about 10 days old June 20, 
‘07, was entirely covered with down except the abdomen, which 
was bare; the skin around the eyes greenish-yellow ; midway 
between tip and beginning of the curve of the beak was a 
whitish protubrance; in all other respects as described in last 
year’s nestling, 
For my own convenience my subjects have all been taken 
from the nest at some period and reared in ‘captivity. I en- 
deavored to supply them with their natural and as varied food 
as they would have received in their nests ; therefore the growth 
