Northern Parula Warbler 447 



In Colorado the Tennessee Warbler is fairly common on migration 

 in the eastern plains part of the State, but seldom comes near the 

 mountains ; it is only recently that it has been commonly reported. 

 It passes north through the State in the second half of May, and returns 

 south late in September. 



Aiken first recorded it from Colorado ; a young male taken in El 

 Paso CO. September 28th, 1872, is still in the Aiken collection ; it has 

 subsequently been met with by Minot at Boulder, May 31st ; at Love- 

 land by Messrs. Osburn and W. G. Smith near the foothills ; and out 

 in the plaiixs at Limon — five examples I9th-23rd May by Aiken, and 

 at Julesburg, Wray, Kit Carson, Manzanola and Holly by Messrs. 

 Smith and Ferril between May 21st and 27th, along the eastern border 

 of the State (W. G. Smith 05, 08.) 



Habits. — Little has been written on the habits of this 

 bird ; it often associates with other Warblers, generally 

 perching high up in trees and. making darts at passing 

 insects ; Minot found it an active little creature but 

 heard no song, only a slender " Tsip, tsip." Aiken 

 considers that it may breed in Colorado, as he observed 

 a bird in July in Colorado Springs which he believed 

 to be this species, but no other evidence is forthcoming, 

 and indeed little is known about its nesting habits at 

 all. In British Columbia it has been found nesting on 

 the ground ; the nest was well arched over with dried 

 grass, and was made of leaves and moss and lined with 

 fine grass. The eggs are creamy-white, fine speckled, 

 and also marked with larger spots of reddish-brown. 

 They measure about '60 x "47. 



Genus COMPSOTHLYPIS. 



Bill short and acute and the culmen slightly curved ; rictal bristles 

 distinct but not very evident ; wing with the four outer primaries 

 subequal ; outer and naiddle toe united at the base for most of the 

 basal joint. 



Three species from northern and tropical America. 



Northern Parula Warbler. Compsothlypis americana usnece. 



A.O.U. Checklist no 648a — Colorado Records — Aiken 72, p. 196 ; 

 Cooke 97, pp. 114, 218 ; 04, p. 45 ; Chapman 07, p. 104 ; H. G. Smith 

 08, p. 190. 



