OF ARTS AND SCIENCES 89 



153. Dendroica fusca. Blackburnian Warbi^er. 



A common summer resident of mixed woods, coniferovis and 

 deciduous, and a common fall migrant. Ten to twelve pairs 

 nest season by season in the fifty-acre piece of Highland wood- 

 land, this species outnumbering all others therein. The Song 

 has been heard at an elevation as high as nearly 3000 feet, but 

 the range of song is mostly below that level and extends to the 

 valley bottom. The song continues with little interruption to 

 about the twentieth of July and is usually heard occasionally 

 in August and September. The latest records of a bird seen in 

 six of the years are September 15, 17, 19, 23, 25, 26 respectively. 

 In 1907 one was seen in the valley on October 3. On September 

 i3> I903) the Blackburnians outnumbered all other species 

 in a large migratory movement of warblers including fourteen 

 species. 



154. Dendroica virens. Black - throated Green 



Warbler. 

 A common summer resident of pine and spruce woods and 

 not uncommon in woods of mixed growth, also a common fall 

 migrant. Nineteen singing males were recorded in making the 

 ascent of Mt. Starr King on June 9, 1905. Two or three pairs 

 usually occupy the fifty-acre piece of Highland woodland. 

 Twenty-five singing birds have been noted on the Jefferson 

 Notch-Cherry Mountain drive. The song period extends to 

 about the twentieth of July, but the song is heard occasionally 

 in August, and in the fall migration individuals not uncommonlj^ 

 sing a husky song which has little of the character and form of 

 either of the songs of the species. Many individuals are seen 

 in the fall flocks of warblers. The latest records are October 3 

 in five of the 3'ears, October 10 in 1904 and 1906, October 5 in 

 190S, and October 4 in 1910. 



155. Dendroica vigorsi. Pine Warbler. 



A pair was found occup3'ing a grove of white pines in the 

 vallej^ in 1899 and 1900 and not improbably had been there in 



