The U.S. Fish and Wildlife Service is urging Americans to fill their bellies with invasive species that are wreaking havoc on habitats across the country. As part of its National Invasive Species Awareness Week, which ends Friday, the agency released a list of five invasive creatures that they're encouraging people to hunt and eat as a way to protect native species. "Some of the biggest ecological nightmares are critters that don't belong here," the USFWS wrote in a public advisory released late last week. "Invasive species outcompete native wildlife, destroy habitats, and mess up ecosystems. But rather than just complaining about them, let's put them on the menu."