Only three wolves left on Michigan island
Inbreeding the likely cause of dwindling numbers
![Isle Royale wolves](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/ticker_tess_IRwolfpack.jpg?fit=860%2C460&ssl=1)
Only one pup (left) and two adult wolves remain on Isle Royale in northern Michigan, the site of a decades-long study of wolf-moose interactions. The pup appears hunched, with an extra skinny waist and deformed tail. Researchers think it won’t live more than a year.
ROLF PETERSON