Mute Swan
     
 

Arrival:
Mute swans are native to Europe. They've been kept as pets there for centuries by royal families. A few pairs of mute swans were shipped to North America in the early 1900s. In the following years, some escaped or were let go in the wild. Today, thousands of mute swans live along the Atlantic Coast (from Massachusetts to Maryland), in Michigan and in Ontario, Canada.

Attack:
When this alien moves into the neighborhood, ducks and geese beware! The mute swan's beauty hides a beastly personality. These are the biggest, toughest members of the waterfowl family...and they don't like to share! One pair of nesting mute swans often takes over an entire pond or small lake. They'll drive out any other swans—or ducks and geese—that try to feed or nest on their turf. Biologists worry that mute swans are hogging homes needed by native waterfowl like the Canada goose and trumpeter swan.