My favorite tribe (Adam's Journey) is currently on grass mingle, food count isn't bad, almost all genes unlocked, and every single baby is absolutely adorable (flowers, pinecones, bananas and balance twins anyone?). Oh, and there are also 2 Poopbeers hanging around.
I have hit rabbils, killed bearyenas, and cracked open termite mounds in what I believe to be the Peta Poopbeer's sight range. I don't know what he thinks of this or who he is targeting, but I don't want to risk finding out by getting too close. Typically every creature in the area flees after someone commits a felony within the Poopbeer's sight range. But they don't seem to mind so far (knock on wood)
I have never had a creature killed by a Defender Bear, mostly because I just scoot my nichelings out of the way