It’s hard to tell how many wolverines are roaming the world right now. They’re reclusive animals with enormous ranges, and they tend to live far from humans.

The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) estimates there are there are probably no more than 10,000 wolverines in Canada, and only 35 breeding adults in the contiguous US. Scientists worry that increased industrial activity will drive that number down, and so last week COSEWIC listed wolverines as a species of “special concern.”

Catch up with all the wolverine news in Issues #1 and #2.