314 Birds of Colorado 
The female is dull greyish-brown above, the head and base of the tail 
washed with yellow; wings dusky, the middle coverts tipped with 
white forming a wing-band, the greater coverts and secondaries edged 
with white ; below, the sides of the head and chest are bright yellow, 
paling slightly on the throat, the rest of the under-parts whitish, 
tinged with dusky on the flanks, and yellow on the under tail- 
coverts ; wing 3-80. 
A young male of the year (July 15th) is like the female; one of the 
second year (June 25th) is intermediate, with a black throat and patch 
on the crown, but mostly greenish-yellow above, and yellow, not. 
orange, below. 
Distribution.—Breeding throughout western North America from 
southern British Columbia to northern Mexico, and east to the middle. 
portions of South Dakota, Kansas and Texas ; in winter to central and 
southern Mexico. 
Bullock’s Oriole is a very common summer resident in Colorado, 
especially in the plains and along the eastern and western bases of the 
mountains. It is stated by Drew to breed up to 10,000 feet, but there: 
seems no authority for this. It is rare at Estes Park (Kellogg), and 
this and Middle Park, where it was seen by Carter, seem to be the 
highest recorded localities. It arrives from the south at the end of 
April (Pueblo 27th April, Lowe) or beginning of May (May 10th 
earliest in El Paso co., Aiken, and for Salida, Frey), breeds in June and 
leaves again at the end of August or beginning of September. 
The following are additional recorded localities : Boulder co. (Hender- 
son), Weld co. (Markman), Denver (Henshaw), El Paso and Lincoln cos. 
(Aiken), Baca co. (Warren), Steamboat Springs (Warren), Mesa co., May 
10th, August 7th (Rockwell) ; La Plata co. (Morrison & Gilman). 
Habits—Bullock’s Oriole is one of the most 
conspicuous and bright-coloured of our summer birds. 
They are chiefly to be met with in open, rolling or prairie 
country, along the streams where there are cotton-wood 
and other trees, and they may often be seen in the 
suburbs of towns where there are plenty of high trees to 
perch in and hang their nests from ; they are not usually 
met with in thickly-wooded or mountainous country, 
or far from water. Their food consists chiefly of berries 
and insects, the latter being eaten in very large quantities 
in the breeding season ; the call-note is like that of the 
Baltimore Oriole, but the song is not so melodious. 
