Reptilia (reptiles), based featured pictures (except the <i>Sphenodon</i>):
<ol><li><a href="//commons.wikimedia.org/wiki/File:Total_internal_reflection_of_Chelonia_mydas_.jpg" class="mw-redirect" title="File:Total internal reflection of Chelonia mydas .jpg">File:Total internal reflection of Chelonia mydas .jpg</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:Sphenodon_punctatus_(2).jpg" title="File:Sphenodon punctatus (2).jpg">File:Sphenodon punctatus (2).jpg</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:AgamaSinaita01_ST_10.jpg" title="File:AgamaSinaita01 ST 10.jpg">File:AgamaSinaita01 ST 10.jpg</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:Flickr_-_don_macauley_-_Crocodile.jpg" title="File:Flickr - don macauley - Crocodile.jpg">File:Flickr - don macauley - Crocodile.jpg</a></li></ol>
All of them are either under a free licence already in Wikicommons, or in the public domain
see respective profiles of photos
CC BY-SA 3.0
Compilation made by <a href="//commons.wikimedia.org/wiki/User:Petter_B%C3%B8ckman" title="User:Petter Bøckman">Petter Bøckman</a>