BIRDS OBSERVED AT CAMBRIDGE, MASS. 57 



Barn Swallow. — Common Summer Resident, but fast de- 

 creasing-, April 20 to September 10. 



Cliff Swallow. — Summer Resident, much less common than 

 formerly, April 28 to September 1. 



Bank Swallow. — Common Summer Resident, Ajjiil 28 to 

 September 1. 



Tree Swallow. — Summer Resident, formerly common, now 

 common only as a migrant, April 5 to October 12. 



Purple Martin. — Locally common Summer Resident, April 

 20 to August 25. 



Cedar Wax wing'. — Not common Permanent Resident ; 

 common Summer Resident ; abundant Transient Vis- 

 itant, in spring, February 1 to April 25. 



Northern Shrike. — Common Winter Visitant, November 1 

 to April 1. 



Red-eyed Vireo. — Abundant Summer Resident, May 10 to 

 September 10. 



Warbling Vireo. — Common Summer Resident, May 10 to 

 September 25. 



Yellow-throated Vireo. — Common Summer Resident, Ma^' 

 8 to September 1. 



White-eyed Vireo. — Rather rare Summer Resident, May 8 

 to September 20 ; formerly common. 



Black and White Warbler. — Very common Summer Resi- 

 dent, April 25 to September 5. 



Yellow Warbler. — Abundant Summer Resident, May 1 to 

 September 30. 



Myrtle Warbler. — Abundant Transient Visitant, April 18 

 to May 20 ; September 20 to November 3 ; a few 

 winter. 



Black-throated Green Warbler. — Very common Summer 

 Resident, May 1 to October 15. 



Redstart. — Very common Summer Resident, May 5 to Sep- 

 tember 20. 



Oven-bird. — Abundant Summer Resident, May 6 to Sep- 

 tember 15. 



Maryland Yellow-throat. — Abundant Summer Resident, 

 May 5 to October 20. 



Chat. — Rather rare Summer Resident, May 15 to (?). 

 18 



