#1: Looks like a Maulberlord, so it's definitely a 'naut. A really, really big one by the looks of it... though it might be the angle. And of course 'nauts are naturally large.
#2: That's obviously a Coamti, but it looks like a rather small one. Of course that might be the other creatures nearby making it look small.
#3: A Gawert. Books say they're semi-intelligent and friendly, and in fact greet passers-by. There's gotta be a good story behind why this one was killed.
#4: This is a Tloke Warrior, by the looks of it. They're poisonous. Probably this one caused some trouble before it was defeated. In addition, apparently Tloke are considered lucky animals. Some people even use them to trim lawns, and some try raising them to grow large in the hopes of being able to ride them, due to their naturally saddle-shaped shell.
#5: Apparently this is an Elder Gorweal. Clearly it was an evil mastermind.
#6: The majestic Fire Carkarass. This also looks a bit bigger than the normal version.
Just figured I'd throw in what they look like to me. And it seems some random lore too.