Genus CYGNUS

Bill of moderate size, raised at the base, of nearly equal breadth throughout; nostrils elliptical, about halfway down the bill; lores naked; wing long; tail short, well rounded at the end; legs short, stout, placed far back.

Swans are found in the temperate and subarctic portions of the Northern hemisphere, in South America, and Australia. Two species have been obtained, as rare stragglers, within Indian limits.

Key to the Species.

Culmen with a prominent knob at the base in adults; loral space black……………………C. olor, p. 413.
No knob at base of bill: loral space yellow……………………C. musicus, p. 414.

BookTitle: 
The Fauna Of British India, Including Ceylon And Burma-birds
Reference: 
Blanford, William Thomas, ed. The Fauna of British India: Including Ceylon and Burma. Vol. 4. 1898.
Title in Book: 
Genus CYGNUS
Book Author: 
William Thomas Blanford
Year: 
1898
Page No: 
413
M_ID: 
313
M_SN: 
Cygnus
Volume: 
Vol. 4
Term name: 
id: 
2299

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