Invasive species are usually given that distinction because they’re foreign and unwanted: they displace other species or somehow threaten the environment. And then there are those who are definitely from away, but not quite taking the state by storm, like:

Possums: The furry little critters only came to Maine 15 to 20 years ago, likely a sign that Maine’s climate is slightly warming. They’ve been seen in York and Cumberland counties. Not all of them are happy they made the move. Possums have been found here with the ends of their tails snapped off: some nights it just gets too cold and they freeze. “They’re pushing it,” as far as habitat goes, said state wildlife biologist Scott Lindsay.

Turkey vulture: Also new to Maine as of the last 15 to 20 years and also likely a result of warming temperatures, however, not as cute as the possum. The scavenger is attracted to farms.

Japanese rock pool mosquitoes: First trapped and ID’d in Maine in 2002, they breed in pools of water. They bite during the daytime (people and animals,) according to a paper by one Yale entomologist. Maine already has 40-plus different kinds of mosquitoes. “It’s just one more added to the swat team out there,” said Jim Dill, a pest specialist at the University of Maine Cooperative Extension.