It is actually stunnable, that bit worried me from what Nezrukas said. It seems to have 2 different AI modes, either the merry-go-round with a more dramatic tune to it, and of course the spikey tail for extra merriness, or a mode where he will jump around, note that it's not leap at, it's jump. As soon as he lands in range he will tailwhip after a brief pause. I suggest getting away from those tail attacks as the bleed is pretty harsh. I did see it jump over water but I think it was more of an accidental "wandering" jump than an AI maneuver to reach me over the river. Keep turniquets handy, that bleed x_x
10 lards, 2 brains and the hide here. Will see what the range is once i kill some more.
Also, just speculating here, but will making a beaverskin cape with these hides make some fancy variation of it?