"In Michigan, however, which has the highest population of mute swans in North America, the creatures are considered pests. According to the Michigan Department

"In Michigan, however, which has the highest population of mute swans in North America, the creatures are considered pests. According to the Michigan Department of Natural Resources, the statewide breeding population increased from about 5,700 to more than 15,000 in just ten years. The birds attack people in the water and on shore, particularly children that wander too close to their nests." Sometimes when I get excited that an animal population gets to the point of potentially excess, I have to remind myself that it might be that we've adapted our lives to the absence of the animal and can't tolerate its presence even in modest amounts. Yes, swans are aggressive, but just because they are annoying doesn't mean they are overpopulated. Or concerns that some wild cats might take dogs. That sucks for the dog owner if it happens, but is it really okay to have the expectation that your animal can be in nature without any natural repercussions? That said, once swans become common we shouldn't be afraid to push back against their aggressiveness. Nature does have away to balance behavior, and if humans think they just have to put up with asshole swans or else kill the swans I think we're missing out on some obvious behavior correction opportunities.