54 BIRDS OBSERVED AT CAMBRIDGE, MASS. 



Mourning- Dove. Occasional during summer in immediate 

 vicinity of Cambridge. 



Red-shouldered Hawk. Common Permanent Resident ; less 

 common in winter. 



Red-tailed Hawk. Common Winter Visitant, November to 

 April ; a few in summer. 



Marsh Hawk. Common Transient Visitant, March 15 to 

 April 15 ; September and October ; a few breed. 



Sparrow Hawk. Rather common Summer Resident, Feb- 

 ruary to November. 



Sharp-shinned Hawk. Uncommon Transient Visitant, 

 April 15 to April 30 ; September and October ; rare 

 Summer Resident ; uncommon Winter Visitant. 



Cooper's Hawk. Common Transient Visitant, April, Sep- 

 tember, and October ; not common Summer Resident ; 

 rare Winter Visitant. 



Bald Eagle. Of irregular occurrence at all seasons. 



Osprey. Common Transient Visitant, April ; Septem- 

 ber. 



Short-eared Owl. Uncommon Transient Visitant, April, 

 October, and November. 



Long-eared Owl. Not common Permanent Resident. 



Screech Owl. Common Permanent Resident. 



Barred Owl. Rare Permanent Resident, sometimes com- 

 mon in November and December. 



Yellow-billed Cuckoo. Common Summer Resident, May 

 12 to August. 



Black-billed Cuckoo. Common Summer Resident, May 15 

 to September 20. 



Kingfisher. Common Summer Resident, April 10 to Octo- 

 ber. 



Downy Woodpecker. Common Permanent Resident. 



Hairy Woodpecker. Uncommon Winter Visitant. 



Red-headed Woodpecker. Irregular at all seasons ; some- 

 times common in fall. 



Flicker. Very common Summer Resident; common Win- 

 ter Visitant. 



Nighthawk. Not uncommon Summer Resident, May 15 to 

 September 25. 



