I made this for the Creature of the Week thing over on the forums. Fun stuff.

http://www.newgrounds.com/bbs/topic/1384703

It also comes with a (very thought up afterthefact) description of this here monstrosity, exciting!

The trospiwe starts of it's life cycle crawling on the ground like so many other creatures, using its orifices on the back for respiration. As it grows, however, it develops the ability to through an internal process convert some of the air it breathes to a gas that allows it to float. The resulting waste products from this process that it later exhales is highly toxic to most other organisms. Very old specimen like the one pictured come to rely entirely on flight, and their limbs atrophy to near uselessness.