To dam or not to dam? The 'river beavers' in the incredible camera trap photographs below, from William MacFarland, live on the Anacostia River which flows from Maryland into Washington DC. They build lodges to live in but have no…

To dam or not to dam? The 'river beavers' in the incredible camera trap photographs below, from William MacFarland, live on the Anacostia River which flows from Maryland into Washington DC. They build lodges to live in but have no…