Tundra swan Cygnus columbianus.

Bibliographic Details
Corporate Author:	U.S. Fish and Wildlife Service
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.] : [U.S. Fish and Wildlife Service], [2009?]
Subjects:	Tundra swan > California > Sacramento Valley.
Online Access:	https://purl.fdlp.gov/GPO/LPS108841

Available Online