The Migration of North American Birds 



19 



PALL MIGRATION 



LOCALITY 



Henry House, Alta 



Okanagan Landing, B. C 



Rapid City, S. D 



Columbia Falls, Mont.. . 



Missoula, Mont 



Cheyenne, Wyo 



Ft. Laramie, Wyo 



Yuma, Colo 



Boulder, Colo 



Beulah, Colo 



Denver, Colo 



Carson City, Ne\- 



Modesto, Calif 



Los Angeles, Calif 



Onaga, Kans 



Number 

 of years' 

 record 



Average date of 

 last one observed 



September 4 



August 25 



x\ugust 30 

 September 30 



Earliest date of 

 last one observed 



September 

 September 

 October 2, 

 September 

 September 

 September 

 September 

 October 5, 

 October 10 

 September 

 October 3, 

 September 

 August 24, 

 September 

 August 14, 



10, 1895 

 12, 1913 

 1909 



10, 1894 



11, 1915 

 5, 1884 



17, 1857 

 1908 

 , 1909 

 10, 1915 

 1909 

 18, 1876 

 1910 

 30. 1895 

 1913 



Notes on the Plumage of North American Birds 



FORTY-SIXTH PAPER 

 By FRANK M. CHAPMAN 



(See Frontispiece) 



Scarlet Tanager {Piranga erythromelas, Figs. 1-4). — The female Scarlet 

 Tanager after acquiring its first winter plumage is alike at all seasons and all 

 ages. Beyond saying, therefore, that our figure of it (Fig. 4) is too pale and 

 yellow, we may pass to the exceptionally interesting plumage changes of the 

 male. 



The nestling of both sexes is dusky green, paler below, streaked indistinctly 

 with blackish. At the postjuvenal molt the tail and wing-quills are retained, 

 and a new plumage is acquired which resembles that of the female but has 

 the lesser wing-coverts black as in the male. The following spring this costume 

 (except the flight-feathers) is exchanged for that of the adult male (Fig. i). This 

 is worn until after the breeding-season when it is molted for the adult winter 

 dress which resembles the female plumage but has the wings and tail black. 

 The molting bird presents a curious patchwork appearance which has excited 

 the curiosity of many observers not familiar with the changes of plumage 

 through which this species passes. At the following spring the scarlet body 

 dress is regained. 



Occasional orange-bodied birds of this species are doubtless to be classed 

 as 'albinistic,' or individuals lacking the full share of pigment possessed by the 

 normally colored kinds. 



Louisiana (or Western) Tanager (Piranga ludoviciana. Figs. 5, 6). In 

 Juvenal or nestling plumage both sexes of this Tanager are dusky yellowish 



