They are huge, blue and eye-catching — but nilgai antelope from Asia are unwelcome interlopers in two South Texas national park sites.

U.S. Fish and Wildlife Service wants people to eat more invasive species. You can get nutria, wild pigs, carp and northern snakeheads in Mississippi ...

Thought to be a protein solution for a growing nation, carp fell out of favor, but the invasive species remains abundant in ...

They are native to East Asia but have become invasive in mid-Atlantic and southeastern U.S. waterways. Snakehead fish “compete with native species for food” and habitats, and there is concern ...