56 BIRDS OBSERVED AT CAMBRIDGE, MASS. 



Field Sparrow. Common Summer Kesident, April 15 to 

 November 1. 



Vesper Sparrow. Very common Summer Resident, April 

 5 to October 15. 



Chipping Sparrow. Abundant Summer Resident, April 15 

 to October 25. 



White-throated Sparrow. Very common Transient Vis- 

 itant, April 25 to May 15 ; October 1 to November 10 ; a 

 few winter. 



White-crowned Sparrow. Uncommon Transient Visitant, 

 May 12 to 22 ; October 1 to 20. 



Fox Sparrow. Abundant Transient Visitant, March 15 to 

 April 20 ; October 20 to November 15. 



Junco. Rather common Winter Visitant; abundant Tran- 

 sient Visitant, September 20 to November 25 ; March 20 

 to April 20. 



Tree Sparrow. Common Winter Visitant; abundant Tran- 

 sient Visitant, October 25 to November 25 ; March 20 to 

 April 20. 



Redpoll. Irregular Winter Visitant, often very abundant, 

 October 25 to April 10. 



Snowflake. Common Winter Visitant, October 25 to 

 March 25 ; abundant in migrations. 



American Crossbill. Of irregular occurrence at all seasons. 



Pine Grosbeak. Irregular Winter Visitant, frequently 

 common ; sometimes abundant November to March. 



Goldfinch. Very common Permanent Resident. 



Purple Finch. Permanent Resident, very common from 

 March to October ; irregular, but at times abundant in 

 winter. 



Rose-breasted Grosbeak. Common Summer Resident, May 

 10 to September 10. 



Towhee. Common Summer Resident, April 25 to Octo- 

 ber 15. 



Indigo Bunting. Rather common Summer Resident, May 

 15 to September 25. 



Cardinal. Casual ; two instances. 



Scarlet Tanager. Rather common Summer Resident, 

 13 to October 1. 



