Trumpeter Swan {!--나팔수큰고니--> - Innoko National Wildlife Refuge From the U.S. Fish and Wildlife Service's online digital media library . 
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Metadata
Title: Swan  
Alternative Title: (none)  
Creator: U.S. Fish and Wildlife Service  
Source: Innoko NWR-038 
Publisher: U.S. Fish and Wildlife Service 
Contributor: INNOKO NATIONAL WILDLIFE REFUGE 
Rights: (public domain) 
Subject: Refuges, Innoko National Wildlife Refuge, Species, Birds
The trumpeter swan (Cygnus buccinator) is a species of swan found in North America. The heaviest living bird native to North America, Cygnus buccinator is also the largest extant species of waterfowl.