Thick-Billed Parrots at Twycross Zoo, Leicestershire, England. A juvenile is in front of an adult, both perching on a rope in an aviary. The juvenile has a pale beak and the adult has a dark peak.
<ul><li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Snowmanradio" title="User:Snowmanradio">Snowmanradio</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Snowmanradio" title="User talk:Snowmanradio"><span class="signature-talk">talk</span></a>)</li>
<li><a href="//commons.wikimedia.org/wiki/File:Rhynchopsitta_pachyrhyncha_-Twycross_Zoo-8.jpg" title="File:Rhynchopsitta pachyrhyncha -Twycross Zoo-8.jpg">Rhynchopsitta_pachyrhyncha_-Twycross_Zoo-8.jpg</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/46153825@N00">Paul Reynolds</a> from UK</li></ul>
CC BY 2.0
originally posted to flickr at <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/46153825@N00/2303611847/">IMG_7124_080227_40D</a> and uploaded to commons as <a href="//commons.wikimedia.org/wiki/File:Rhynchopsitta_pachyrhyncha_-Twycross_Zoo-8.jpg" title="File:Rhynchopsitta pachyrhyncha -Twycross Zoo-8.jpg">Rhynchopsitta_pachyrhyncha_-Twycross_Zoo-8.jpg</a>