BurNs—On BrROAD-WINGED HAWk. 278 
band on Nip; 20th, fifth dark tail band appearing; 23rd, Tuck 
has lost all traces of down; 28th, Nip has six bars on tail, 
same as Tuck, and has no longer traces of down under chin 
or about eyes. August 3rd, seven bars on tail; 9th, both 
hawks’ eyes at last a clear pearl gray without the brownish, 
cloudy effect. 
A female designated * Buteo ” was taken from the nest July 
1, (06, when 29 days old, when the juvenile plumage was de- 
veloping under nestling down, the tips of nearly all the feath- 
ers bearing tufts of down, the occupit, lores, middle of breast, 
etc., only in the natal stage, irides pearl gray. July 4, wing 
15:50, tail 3.50; 6th, second bar appearing on lengthened tail, 
barring appearing on primaries and secondaries; 7th, down 
off of back and wings, confined to ends of rectrices, wing 
coverts and head; 9th, tail shows five narrow dark bars, down 
almost absent from head and chin, whole upper plumage ex- 
hibits silky sheen; 10th, down yet present on wing coverts, 
strip over eye, middle of forehead, middle of chin, scattered 
on malar; 15th, down disappearing from all but middle of 
chin and throat; 22nd, chin down absent; 23rd, seven dark 
bars on tail, irides darker; August 5, rufous edging of upper 
plumage worn away; Sept. 17, irides a light burnt umber. 
It will be noted that the irides became pearl gray in 29-34 
days. Juvenile plumage shows first signs of development when 
the bird is 15 days old and is completed by the 45th—51st day, 
a period of about one month to five weeks. Jefferies notes 
eleven primaries. ten coverts, and a terminal claw, in the 
young examined. 
DrVELOPMEN? OF INstINCTIVE Haprrs—A nestling at 10 to 
12 days of age snatched bits of meat from my fingers, reject- 
ing a bit with a piece of bone in it, throwing the morsel some 
distance; and peeped lustily for more. It could turn about the 
box very quickly, prance on one foot at the time and go through 
the motions of preening its own feathers, and slept with the 
crown of its head on ‘the bottom of its nest with its beak be- 
tween its thighs. First attempt to pick up food was when it 
had attained the age of 17 days, unsuccessfully attempted to 
