There are regulations against willy-nilly blockage of rivers, but are rivers of wildlife that have passed across landscapes for millennia any different. If their season movements are important to their survival,  should their ancient routes be protected from impairment. The Wyoming Migration Initiative has prepared maps that help delineate where wildlife goes; unfortunately decades of development  and its cumulative effects  have made corridor protection on private lands urgent. Photo courtesy Tom Koerner /US Fish and Wildlife Service
There are regulations against willy-nilly blockage of rivers, but are rivers of wildlife that have passed across landscapes for millennia any different. If their season movements are important to their survival, should their ancient routes be protected from impairment. The Wyoming Migration Initiative has prepared maps that help delineate where wildlife goes; unfortunately decades of development and its cumulative effects have made corridor protection on private lands urgent. Photo courtesy Tom Koerner /US Fish and Wildlife Service