Unseasonably warm temperatures led to a halt in this winter's study of wolves and moose at Isle Royale National Park as weak ice conditions made it too dangerous to try to land planes there.
For the first time, scientists have documented an adult wolf killing red fox kits in their den. The event occurred in Isle Royale National Park, where researchers found evidence that an adult male wolf known as 016M attacked the kits, killing and possibly feeding on at least two of them – and possibly also killing a third littermate.