336 



KET AND DESCRIPTION 



feathers of this and the next species are pointed. The best 

 method of distinguishing this species from the last is by the 

 difference in size and the acute instead of rounded ends to 



the central tail feathers. 

 To separate it from the next 

 compare the length of the 

 horny covering to the nos- 



1 ! trils, with that of the top of 



bill or culmen; in this species it is always more than half; 

 in the next, less than half. In the adult, the length of tail 

 enables one to separate them. 



Length, 18; wing, 12J (11|-13J); taU, 5 (young), 8J (adult) ; tarsus, 

 If ; culmen, If. Northern regions ; breeding in high latitudes, and win- 

 tering in America from New York and Cali- 

 fornia to South America. Migrates through the 

 Lake region as well as along the coasts. 



4. Long-tailed Jaeger (38. Stercord,rius 

 longicatldus). — This is another bird like " -~> 



the last two, having the same coloring and ' ' 



occurring in the light and dark phases. In the mature birds 

 of this species, the central tail feathers are much longer. 



This bird, as stated 

 \ above, has the horny 

 cere which covers 

 the nostrils less than 

 half as long as the 

 culmen. In young 

 birds before the full 

 length of the tail is 

 attained, the species 



Long-tailed Jaeger u j' j.' ■ i_ i 



^ ^ can be distinguished 



only by noting the length of the cere. See the illustra- 

 tion. 



Length, 22; wing, 12^ (11|-13); tail, 6 (young), 11-15 (adult); tar- 

 sus, If ; culmen, 1 J. Northern regions ; breeding in high latitudes, and 

 migi-ating mainly along the coasts to the Gulf of Mexico and the West 

 Indies. 



