I'll post my ecosystem freindly predators (because I only have the free SCC and if you think I'll pay money for it when spore is already out at this point then you're crazy) when sporepedia comes back up.
EDIT:
TerrorbirdPredator made after a late night watching "Walking with Beasts". Uses the dog mouth, 1 speed but has literaly all the impress ways, so they can be perswaded by most players.
BUGGER. Crashed again.
GrunterHuge predator, he annihalates everything in his path. But he's sooo loooooneleeeeeey. Maxed out jaws, some slash attack and slightly buggy animation, he has a display crest on his head to make him a bit more scary are larger. Literaly a tank, however he has a weak spot on the top his head, he has literaly no skull, par from a bit of carthalge and two bony plates, but this giant can be taken down by even small vermin if they hit it in the right spot.
FlutterbyIt's exactly as it's name describes, but it's a scavenger, due to the face that it's supposed "prey" usualy kills it. It's can fly, but only slightly. It is only there for you to eat, or to be used as a distraction against more dangerous predators.
TwirlyRun of the mill predator, he will be your basic enemy troughout the creature phases, and he looks funky too.