Just a little advisory for those (like me) who have trouble with lizard and frog heads..
Actually this could apply to many different animals in the amphibian and reptile category.
hope it helps folks!
Photos referenced from the following websites
How Stuff Works: [link]
Wikipedia- Red Eyed Tree Frog : [link]
National Geographic: [link]
Nigelmcloughlin.com - Lizard: [link]
Merriam-Webster visual dictionary online: [link]
Flickr- Sannastar's Photostream - pen and ink lizard skeleton - [link]
Monitor Lizard 3 (skulls_collection69's photostream) - [link]
and I would also recommend skulls_collection69's photostream for some excellent skeleton photos. [link]