Hybridization between westslope cutthroat trout and non-native rainbow trout in Glacier National Park. Green = westslope cutthroat genes. Red = rainbow trout genes.
National Parks Service

Glacier National Park released an environmental assessment Friday for a proposal to kill off non-native fish in a remote area. Biologists say that could help fortify native species against the threats of climate change, invasive species and habitat loss.

