CATALOGUE OF CANADIAN BIRDS. 641 
atrives about May 8th and leaves about August 18th. (A. B. 
Klugh.) One specimen only of this distinctive species was secured 
at Pembina—perhaps its western if not its northern limit. (Cowes.) 
A common summer resident in the wooded parts of Manitoba. Its 
choice of locality usually causes it to be found chiefly in half-open 
woods, especially along the edges of low, marshy places. It fre- 
quents the tops of the highest trees. (E. T. Seton.) Tolerably 
common at Aweme, Manitoba, where it breeds. (Criddle.) Very 
abundant as a migrant in Manitoba, breeds sparingly throughout the 
province. (Atkinson.) 
BREEDING Nores.—Found a nest in Beechwood cemetery near 
Ottawa, which was built in an upright crotch about six feet from 
the ground. The nest was a loosely woven mass of dried weeds and 
fibrous substances lined with fine grass and horse-hair. Eggs 4, 
white with reddish brown markings. (G. R. White.) Nests around 
Ottawa in June and also at Lake Nominingue, 100 miles north of 
Ottawa, in raspberry bushes-and low shrubs; the nests are made 
with grasses and strips of bark lined with vegetable fibres and finer 
strips of bark; nest 3 x 2 and 2x 1.25. (Garneau.) On May 22nd 
of the past year (1900) not far distant from each other, I noticed 
two newly formed nests of this bird; the first seen was deep in the 
underwood, and placed in the fork of a small bushy maple about 
twenty inches off the ground; this was so bulky and compactly built 
that at first I took it to be a nest of an indigo bird; it was formed of 
a kind of woody fibre gleaned from decayed timber, vines and grasses, 
and lined with long, black horse-hair, which it must have taken the 
builder a good deal of time, with much trouble, to collect and place 
in position; on the above date this nest contained an egg of the cow- 
bird, which I removed and—five days after—it contained three eggs 
of the chestnut-sided warbler, and on thesé the female was incubat- 
ing, and as the usual set of eggs of this species numbers four, it was 
evident that the cow-bird had removed one of the warbler’s when 
she deposited her own; this tramp among birds, is one of the worst 
enemies with which the whole family of the warblers has to contend, 
as many of their nests are found to contain one or more of the cow- 
bird’s eggs; and there is danger that the progeny may destroy the 
whole brood in the nest of the species in which it is cradled; on one 
occasion I found a nest of the chestnut-sided warbler which contained 
four cow-bird’s eggs, and but one of the warbler’s own; the eggs of 
41 
