Answer
A moose attempted to groom itself in an effort to rid itself of winter ticks. Some clumps of moose hair were also shed in the snow. By late April, moose carrying large populations of winter ticks (which can number in the tens of thousands per moose) are often weak from the collective blood loss as well as from increased energy spent to maintain body heat due to missing hair. It is unclear whether the blood in the snow is directly related to the damage done by the ticks.
This week’s contest winner was Chris Alexopoulos