Here's a weird one from England, via Yahoo:
Dog owners in a town in central England were urged to beware of killer swans after two of their canine friends were drowned by enraged birds.Mansfield district council reported that a male swan had fatally attacked a dog that had dived into a pond at a local park, with an animal rights activist describing the behavior as "highly unusual."
The council said the swan, a bird known by animal experts to be fiercely protective of their territory and family, had merely sought to protect its offspring.