Gull.

120. BONAPARTE GULL. 13 in.
(Larus philadelphia. 60.)

Back and wings, light pearl-gray; head and throat, dark slate color; back
of head, neck, underparts and square tail, white; wings tipped, and
_bordered narrowly on the outside edge with black_; feet and legs, red;
bill black. Winter Plumage: Hood, grayish white. Large flocks seen in
Lincoln Park. *Common Tern.

121. COMMON TERN. 15 in.
(Sterna hirundo. 70.)

Pearly gray back and wings, whiter on rump; _top of head, shining black_;
pure white on throat; dusky-white below; tail forked, _outer edge
darkest_; bill long and red, blackening towards tip; feet reddish. Winter
Plumage: Front of head and under-parts, white; bill nearly black.
*Bonaparte Gull.

122. AMERICAN MERGANSER. 25 in.
(Merganser americanus. 129.)

Black; rump and tail, ashy gray; head, throat and upper part of neck,
greenish black; wing, _largely white_, edged with black and crossed by a
black bar; white below, extending around the neck in a narrow collar;
long red bill tipped with black; eye, red; shows salmon tinge below in
flight. Female: Ashy-gray, with sharply defined brown head and neck and a
pale salmon or brownish tinge across upper breast; _throat_, _white_;
wings largely dark with a white patch; small crest on back of neck; feet
orange; eye yellow; rare; "pursues and catches food under water."
*American Golden-eye. *Red-breasted Merganser.

123. RED-BREASTED MERGANSER. 22 in.
(Merganser serrator. 130.)

Long ragged crest; head and neck black; broad white collar; broad
cinnamon band streaked with black across the breast, otherwise white
below, showing salmon tinge in flight; wing largely white, edged and
barred twice with black; eye and bill, red. Female: Back and wings dark
gray turning to brown on head and neck; much paler on sides of neck and
throat and gray across breast; crest, less prominent; white wing-patch;
common. *American Merganser.

124. HOODED MERGANSER. 18 in.
(Lophodytes cucullatus. 131.)

Black, including throat and neck; large, circular crest, white, bordered
with black; white below running up in front of the wings in two points;
sides brownish, finely lined with black; white wing-patch, crossed by
black bar; also lengthwise white