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, Movenien! 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 Sumas 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. —lIrregular 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, 
