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, 

 Ax^ril 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. 



Shoi't-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 Siunmer Resident, Ajiril 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, 



