BIRDS OF 



into the belief that in mature adult birds the sexes are nearly 

 alike, but that the female is longer in acquiring the black of the 

 head and throat, and is sometimes found with it imperfectly 

 developed or entirel)' wanting. 



277. SYLVANIA PUSILLA (Wils.). G85. 



Wilson's Warbler 



Clear yellow-olive ; crown glossy blue-black ; forehead, sides of head and 

 entire under parts clear yellow ; wings and tail plain, glossed with olive 

 upper mandible dark, under pale ; feet brown. Female and young similar 

 colors not so bright, the black cap obscure. Small; 43'5 ; wing, about 2J 

 tail, about 2. 



Hab. Eastern North America, west to and including the Rocky Mount- 

 ains, north to Hudson's Bay Territory and Alaska. Breeds chiefly north of 

 the United States, migrating south to Eastern Mexico and Central America. 



Nest, a hollow in the ground ; lined with fine grass and horse hair. 



Eggs, 5 ; dull white, freckled with rust3'-brown and liliac. 



Wilson's Fly-catciier passes through Southern Ontario on its 

 way to the north, in company with the Mourning Warblers and 

 other late migrants. Like some of the others it has certain 

 resting places, where it appears regularly in limited numbers 

 every spring, but strangers unacquainted with its haunts might 

 ransack the country for miles without seeing a single specimen. 

 The greatest number go far north to spend the summer, but it 

 is probable that a few remain in intermediate districts, for Mr. 

 Geo. R. White found a pair nesting in his garden in Ottawa. 

 This is the only record of the kind I have for Ontario. 



In " New England Bird Life, " part L, page 172, is an account 

 of a nest found by Mr. D. H. Minot on Pike's Peak, 11,000 feet 

 up, near timber line. The nest and eggs were as described 

 above. 



278. SYLVANIA CANADENSIS (Linn.). G86. 

 Canadian Warbler. 



Bluish-ash ; crown speckled with lanceolate black marks, crowded and 

 generally continuous on the forehead ; the latter divided lengthwise by a 

 slight yellow line ; short superciliary line and edges of eyelids yellow : lores 



278 



