627. WARBLING VIREO, Vireo gilvus (Vieill.) 



The warbling vireo was found regularly in all localities under 

 consideration. Like the red-eyed vireo, it breeds abundantly 

 in the Flathead region. The charming song of this vireo, 

 which is not interrupted until the author takes its departure 

 for its winter home, enlivened the bushy woods near the lake, 

 and frequently regaled the ear of the collector when all other 

 songs had been hushed by the mid-aftemoon heat. It is iater- 

 esting to watch this songster as it warbles forth its ditty while 

 engaged earnestly in seeking its insect food, seldom lifting 

 its head from its task, singing as it works. 



653. YELLOW WARBLER Dendroica aestiva (Gmel.) 



The yellow warbler was found abundantly in the haw thickets 

 at the lower end of Elathead Lake, where its song was still 

 heard, and its movements observed as it flashed among the 

 branches in its active pursuit of insect fare. We also noted its 

 common occurrence at Crow Creek, in the thickets fringing the 

 streamside. 



It is abundant in the swamp woods between Swan River and 

 Flathead River, nesting regularly in the breeding season. 



656. AUDUBON'S WARBLER, Dendroica auduhoni (Towns.) 



This handsome warbler was found to be common in the region 

 under consideration. The clear, ringing songs of the males 

 were regularly heard in the earlier part of the season, uttered 

 from the middle and upper stories of the taller evergreens. 

 It was observed on the sides of Mt. McDonald to 7,500 feet 

 elevation. 



Common everywhere near the Station in the higher woods, 

 and nesting regularly in the earlier season. Very common in 

 the woods in middle August, when the fall migration probably 

 begins. In a day's collecting at Estey's Pond, August 27, the 

 most active bird of the surrounding woodland was Audubon's 

 warbler, and several specimens of adults and young of the 

 year were taken by accident beyond what we needed, from diffi- 

 culty in identifying them in the tall trees which they generally 

 prefer. 



