The Migration of North American Sparrows 



105 



FALL MIGRATION, continued 



Keokuk, la 



North Freedom, Wis 



Chicago, 111 



Houghton, Mich 



Detroit, Mich 



Ottawa. Ontario 



Point Pelee, Ontario 



Oberlin, O 



Waterloo, Ind 



Bloomington, Ind. . . 



Fallon, Mont 



Douglas, Wyo 



Pueblo, Colo 



Number 



of years' 



record 



Average date of 

 the last one seen 



November 17 

 October 23 

 October 22 

 October 9 

 October 30 

 October 19 



November 5 

 October 29 

 November 13 



October 



Latest date'of the 

 last one seen 



December 8, 1896 

 October 29, 1904 

 November 12, 1906 

 October 13, 1906 

 November 5, 1900 

 November 9, 1893 

 January 30, 1909 

 January i, 1906 

 November 4, 1894 

 November 22, 1903 

 October 5, 1908 

 October 8, 1894 

 October 24, 1886 



BLACK-CHINNED SPARROW 



From its winter home in Mexico, the Black-chinned Sparrow comes north 

 in spring, and its arrival has been noted in Cahuenga Valley, Los Angeles 

 County, Cal., April i, 1896; Johnson Canon, Panamint Mountains, Cal., 

 April 6, 1891 ; Huachuca Mountains, Ariz., April 4, 1902. The individuals that 

 were seen at Tombstone, Ariz., February 13, 1910, and in the Santa Catalina 

 Mountains, Ariz., February 26, 1885, may have been unusually early 

 migrants, or they may have been birds that had wintered in the vicinity. 



The last one was noted near Pasadena, Cal., September 10, 1897, and in 

 the Big Hachita Mountains, N. M., November 24, 1889. 



Notes on the Plumage of North American Birds 



FOURTEENTH PAPER 

 By FRANK M. CHAPMAN 



(See frontispiece) 



White-throated Sparrow (Zoiiotn'chia albicollis, Figs. 1-2). In juvenal 

 (nestling) plumage, the White-throated Sparrow is heavily streaked below, 

 the underparts at this age closely resembling those of a young Song Sparrow. 

 The back, however, is of about the same color as that of the first winter plumage 

 (Fig. 2), which, in late July and August, is acquired by molt of all the feathers 

 except the tail and wing quills. Some birds of this age more closely resemble 

 the adult below than the one figured, while in others, particularly females, 

 there is no trace of a white throat, this part, with the breast, being gray, with 

 a somewhat obscure spot on the center of the breast. This plumage has puzzled 

 many bird students. In it, the underparts more nearly resemble those of a 

 winter Swamp Sparrow than they do those of an adult White-throat. In 

 April, both immature and adults undergo a partial molt and pass into adult 



