A wildlife rehabilitation facility is raising three newborn bear cubs after their mother died during a research project.
Wisconsin Public Radio reports that researchers tranquilized the mother bear and an older cub in their den in February so they could replace batteries on a radio collar.
The mother bear apparently died after the cub rolled onto her head.
The researchers contacted Wild Instincts, a wildlife rehabilitation facility in Rhinelander, to take the three newborns with two and a half hours.
The facility's wildlife rehabilitation director, Mark Naniot, says the cubs are doing well.
He called the mother bear's death “an accident.”