Aythya collaris range map. Source - <a rel="nofollow" class="external free" href="http://maps.iucnredlist.org/map.html?id=100600475">http://maps.iucnredlist.org/map.html?id=100600475</a>
<a href="//commons.wikimedia.org/wiki/User:Izvora" title="User:Izvora">Izvora</a>
<span class="int-own-work" lang="en">Own work</span>