134 



BLACK-THROATED BLUE WARBLER 



Nestling 3- — Above brownish olive-green, lores black, auriculars blackish, 

 a whitish superciliary line ; throat and breast somewhat paler than back or 

 dusky yellowish, belly whitish or yellowish white ; tail as in young d", black 

 edged with blue and marked with white ; wings as in young S, black the 

 feathers edged with blue or greenish with a white patch at the base of the 

 primaries ; wing-coverts like back, edged with brownish. 



Nestling ?. — Paler than nestling <S, no black in lores or auriculars ; below as 

 in nestling c?, wings and tail as in young Fall ?, greater and median wing- 

 coverts like back, edged with brownish. 



General Distribution. — Eastern North America; north to New- 

 foundland and Hudson Bay ; west to the Mississippi River. 



Summer Range. — Common as a breeder in the southern portion 

 of Quebec and south in the mountains to Maryland ; less common 

 north to Newfoundland, northeastern Quebec, and northern Ontario, 

 Outside of the mountains it breeds south through northern New 

 England to Massachusetts (Berkshire) and Connecticut (Eastford), 

 to New York (Oneida and Hamilton Counties), southern Michigan 

 (Detroit), northwestern Michigan (Porcupine Mountains), and 

 northern Minnesota. 



South of the breeding range it occurs rarely west of the 

 Mississippi in Iowa and Missouri; accidentally in Nebraska (Lincoln, 

 Omaha, West Point), Kansas (Finney Co., October 17, 1891), Colo- 

 rado (Denver, May 24, 1888, Yuma, September 19, 1904), New 

 Mexico (Gallinas Mountains, October 8, 1904,) and California (Faral- 

 lones, November 17, 1886). 



Winter Range. — The West Indies north to Florida (Key West). 

 Accidental in Guatemala and Colombia. 



Spring Migration. — 



PIPAGE 



No. of 

 years' 

 record 



Average date of 

 spring arrival 



Earliest date of 

 spring arrival 



Atlantic Coast — 



Southern Florida 



Mt. Pleasant, S. C 



Asheville, N. C. (near) 



Raleigh, N. C 



French Creek, W. Va. 



Washington, D. C 



Germantown, Pa 



Renovo, Pa. 



New Providence, N. J. 

 Holland Patent, N. Y. 



Hartford, Conn 



Central Massachusetts 

 St. Johnsbury, Vt. . . . 



6 

 II 

 4 

 7 

 7 

 9 

 6 

 7 

 5 

 II 

 6 



April 24 

 April 27 

 April 29 



May 

 May 

 May 

 May 

 May 

 May 10 

 May 8 

 May 9 



March 9, 1886 

 April 16, 1890 

 April 19, 1893 

 April 6, 1888 

 April 18, 1889 

 April 27, 1888 

 May I, 1888 

 April 27, 1902 

 May I, 1894 

 April 28, 1891 

 April 29, 1894 

 May 5, 1895 

 May 5, 1897 



