I ain't all that great by my own view with what I have done, but I thought it worth spreading at very least.
This is just a bit of what I have done, and all of this is on AutoDesk Sketchbook which isn't my preferred program, but I digress.
I'm not sure how this'll line up, but I am putting descriptions regardless.
Cenote-crustacean
#1 Cenotion
Its skin is pasty and thin, making prolonged exposure to high frequency waves (one would consider sunlight) hazardous. As a result, these creatures typically reside in moist caves or aquifers only leaving at night in search of small game and tubers.
Propulsion-pelican
#2 Propullican
This creature evolved in the large open plains of the world, using its tail to hurdle itself long distances in pursuit of game. Recently, these creatures have experienced a population boom in the midst of nearby forests, finding new uses for their tails, using them to swing on branches with great momentum into prey.
They blow air into the bags on their necks to vocalize. The reason for this is unknown.
This one I thought up around that "mayan apocalypse".
Argos-Tortoise
The complex nervous system on this creature's spineless scaled cartilage torso allows it to interpret the world around it up to a mile,solely based on movement,despite the lack of eyes. If the creature senses danger, it will hunch over like when it eats, forming a protective layer of cartilage covered in scales. In local tales, one of these creatures predicted a volcanic eruption, allowing nearby villages to get word of the blast hours before it actually occurred.
Neo-Bugul Noz
These creatures do not have long life spans, great intellect, or strength. Nothing fears them, many prey on them, and the few that avoid them are humans. These creatures survive solely through reproduction. From birth, all they do is eat and release spores into the air which will link with more spores. This species actually periodically goes extinct during the winter each year when its life span comes to conclusion. Then in the coming weeks following winter, the spores form new creatures in mid-air creating the appearance of a sole forest spirit in the wind.
"Mana" (this was intended to be a background but DA didn't like the resolution)
NCR Ranger I did trying to adjust to tablet. (if you haven't noticed by now, I really like new Fallout games)
"Civil Hand Gesture"
Pac-Man Ghost (this was mainly just figuring out brushes and colors on sketchbook. I really miss photoshop...)
http://goldfisharmada.deviantart.com/
Edit: Tips are still requested if you have any. Also, the sundries were a lie.