Raccoons and possums do the most damage to small pets and livestock such as rabbits and chickens, though there are wolves in the Balch Creek area of Gresham which are associated with making even larger dogs vanish. There are abundant hawks and other birds of prey which are dangerous to rodents and frogs. Bats cause quite a bit of trouble for some too.But of course, the absolute worst is human. See sexual predators .
I saw a dead cougar on the side of the road in Portland....Coyotes. I live downtown, and I ve heard some howling before.Mostly cougars. And not just the older woman kind ;)
cougars, coyotes, bears, although humans tend to kill more people than any of the wild animals.