Mouth

Mouths from the creature editor:

There are a 40 mouths to choose from, including mouths with pincers, suckers, sharp teeth, and plain old human-like lips. Each mouth has a different attribute that will affect the stats of your creature. A large mouth full of teeth, for example, might give your creature plus-10 points to its biting ability. The type of mouth also affects whether your creature will be a carnivore, herbivore, or omnivore. You can place as many mouths as you see fit on your creature, and you can place them wherever you want, but every creature MUST have at least 1 mouth to be saved. 

Note: The Biting ability is limited to 5 points.

Mouth part data
The names were taken from various videos of Spore, including new 2008 demos.

All mouths provide a mating call and at least Bite 1 and Sing 1. Four mouths on the same row will give creatures voices that are similar, if not the same.

The free demo contains the Reptilian and Insect mouthparts.

Following is a list of all the mouths arranged in order of complexity cost: Modifying the mouth's size, but not shape, will affect the creature's voice.
 * Mouths:

Although some mouths will increase a creature's spitting capability, it alone cannot let the creature spit. (The creature will make a spitting motion but nothing will come out.)

Cell Mouthparts
These mouths are only available in the Cell Editor. They can be kept when your cell evolves into a creature, but if they are taken off, they cannot be put back. All of them have the same "voice" as the "Insect" row of mouths.