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CATALOGUE OF CANADIAN BIRDS. 61I 
Park, Ont., in June and July, 1900. (Spreadborough.) Not as com- 
mon as formerly in summer though it still breeds in fair numbers 
around London, Ont. (W.£. Saunders.) Common as a migrant, 
breeding in varying numbers every year at Guelph, Ont.; arrives 
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 com- 
mon 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 
frequents the tops of the highest trees. (Zhompson-Seton.) Tol- 
erably common at Avenue, Manitoba, where it very likely breeds. 
(Norman Criddle.) 
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. Wiuite.) 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 2 x 1°25. (Garneau.) 
On May 22nd of the past year (1900) not far distant from each 
other, I noted 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 these the female was incubating, 
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 
