=177. Black-bellied Tree Duck= (_Dendrocygna autumnalis_). L. 22. _Ads._ belly and tail coverts _black_: foreback and breast gray; greater wing-coverts whitish. _Notes._ A shrill whistle. (Elliot.)

Range.--Tropical America north to southern Texas.

Color Key to North American Birds — Part 55

=178. Fulvous Tree Duck= (_Dendrocygna fulva_). L. 22. _Ads._ Belly uniform rusty brown; upper tail coverts white; a black streak on hindneck; no white in wing. _Notes._ A squealing whistle.

Color Key to North American Birds — Part 55

Range.--Tropical America, north in summer to Texas, Louisiana, Nevada and central California. "Casual in North Carolina and Missouri." (A. O. U.)

Color Key to North American Birds — Part 55

=169. Lesser Snow Goose= (_Chen hyperborea_). L. 23-28, _Ads._ White, head sometimes rusty; primaries black. _Yng._ Head, neck, and above grayish.

Range.--"Pacific coast to the Mississippi Valley, breeding in Alaska; south in winter to southern Illinois and southern California; casually to New England." (A.O.U.)

=169a. Greater Snow Goose= (_C. h. nivalis_). Similar to No. 169, but larger, L. 30-38.

Range.--Eastern North America; breeds in Arctic regions; winters from Chesapeake, New Jersey (rarely) south to Cuba; rare on Atlantic coast north of Maryland.

=170. Ross Snow Goose= (_Chen rossii_). L. 21; B. 1.6. Similar in color to No. 169, but much smaller; bill particularly smaller.

Range.--Arctic America in summer; Pacific coast to southern California and east to Montana in winter.

=180. Whistling Swan= (_Olor columbianus_). L. 55. Nostril nearer to tip of bill than to eye. _Ads._ White, bill and feet black; a small yellow spot before the eye. _Yng._ Head and neck brownish, rest of plumage washed with grayish. _Notes._ _'whoogh_, _'whoogh_, very loud and shrill. (Nuttall.)

Range.--North America; breeds within Arctic Circle; winters from British Columbia (?) Lower Mississippi Valley, Chesapeake Bay, south to Gulf of Mexico; rare on Atlantic Coast north of Virginia.

=181. Trumpeter Swan= (_Clor buccinator_). L. 65. Nostril about in middle of bill. _Ads._ White, bill and feet black; _no_ yellow on lores. _Yng._ Head and neck brownish; rest of plumage washed with grayish. _Notes._ Loud and sonorous in tone like those of a French horn. (Elliot.)

Range.--"Chiefly the Interior of North America, from the Gulf Coast to the Fur Countries, breeding from Iowa and the Dakotas northward; west to the Pacific Coast; rare or casual on the Atlantic." (A.O.U.)