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; « 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 plains at Limon—five examples 19th-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 middle toe united at the base for most of the 
basal joint. 
Three species from northern and tropical America. 
Northern Parula Warbler. Compsothlypis americana usnee. 
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. 
