our coons can make some really strange sounds. but not really knowing what the sound sounds like, it would be hard to guess. we have coyotes here and they sound very similar to hyenas. no bobcats, panthers, bears etc. the most dangerous would be the coyotes and maybe the sly ole fox. but around here, the fox is rarely seen. do you have badgers or wolverines in your area? i know they make some horrible sounds and they are very vicous!