<i>Anser erythropus</i>
Naumann
1905
<a rel="nofollow" class="external free" href="http://www.biologie.uni-hamburg.de/b-online/birds/1615_17.htm">http://www.biologie.uni-hamburg.de/b-online/birds/1615_17.htm</a>; originally uploaded to pl.wikipedia.org by <a href="//commons.wikimedia.org/wiki/User:Radomil" title="User:Radomil">Radomil</a> on Jul 27, 2004