BIRDS OBSERVED AT CAMBRIDGE, MASS. 538 
Herring Gull.—Abundant Winter Visitant, November to 
April. 
Common Tern.—Casual in September. 
Wood Duck.—Common Transient Visitant, March and 
April; August to November; a few breed. 
Pintail.—Casual Transient Visitant, April, September and 
October. 
Green-winged Teal.—Uncommon Transient Visitant, April; 
September to November. 
Blue-winged Teal. — Rare in spring; very common, at 
least formerly, August to October. 
Canada Goose.—Common Transient Visitant, March and 
April; October to December. 
Great Blue Heron.—Common Transient Visitant, April 
and May; September to November; occasional in 
summer. 
Little Green Heron.—Common Summer Resident, May 5 
to September. 
Black-crowned Night Heron.—Permanent Resident, most 
common in August and September. 
American Bittern.—Not common Summer Resident, April 
15 to November. 
Sora.—Very common Summer Resident, April 20 to Octo- 
ber 20. 
Coot.—Transient Visitant, rare in April; common Septem- 
ber to November. 
Woodcock.—Summer Resident, formerly common, fast be- 
coming rare; March to November. 
Spotted Sandpiper.—Common Summer Resident, April 26 
to September. 
Wilson’s Snipe.—Common Transient Visitant, April 5 to 
May 5; September and October. 
parr Sandpiper.—Very common in August and 
Killdeer. caret SS Visitant; two instances. 
Semipalmated Plover.—Rare in spring ; sometimes com: 
mon in August and September. 
Bob-white.—Common Permanent Resident. 
Ruffed Grouse.—Common Permanent Resident. 
