The species is “very territorial” and aggressive, and threatens native bird species, the California Department of Fish and Wildlife says.

Find out how asparagus and vanilla orchids demonstrate the importance of cell walls in plant survival and adaptability.

"If this trend continues, it could have a number of consequences," said Robert Björk, an Arctic ecosystem researcher at the ...

Weighing as much as 30 pounds as adults, with wingspans that can exceed 10 feet, Minnesota’s trumpeter swans were killed for ...

Due to its vast size — stretching from Canada and Greenland in the north, to Mexico in the south — North America contains a ...

As the planet warms, strange new animals are emerging in unexpected places. These creatures might look like they have come ...

It will soon be legal to hunt and kill mute swans anywhere in California, after Governor Gavin Newsom signed state ...

In his revered 1917 poem “The Wild Swans at Coole,” Irish writer William Butler Yeats describes the fabled birds as brilliant ...

Gates of the Arctic might be North America's most remote national park, but it's home to some extraordinary animals.

Our preconceptions are often challenged when we engage with people cross-culturally. What might we discover if we turn that ...

As a species, humans possess a kind of superpower: the ability to survive on a remarkably wide variety of foods, allowing us to thrive everywhere from the Amazon rainforest to the Arctic tundra. Now, ...

Reindeer were brought to St. Lawrence Island after a devastating famine in the late 1800s. Now the animals could be a food ...