Trumpeter Swan cygnets (Cygnus buccinator) {!--나팔수큰고니--> From the U.S. Fish and Wildlife Service's online digital media library. 
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Metadata 
Title: Trumpeter Swan Cygnets   
Alternative Title: (none)  
Creator: WKB  
Source: AK/RO/01837 
Publisher: (none) 
Contributor: ASSISTANT REGIONAL DIRECTOR-EXTERNAL AFFAIRS 
Language: EN - ENGLISH 
Rights: (public domain) 
Audience: (general) 
Subject: Birds, Refuges, Tetlin National Wildlife Refuge 
Date Created: September 01 1989
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.