native plants

AP Images

More than half of North American bird species are threatened by climate change, according to the national Audubon Society, which links the welfare of birds to urbanization.

Nati Harnik / AP Photo

Of the roughly 2,000 native plant species in Pennsylvania, 347 are currently considered rare, threatened or endangered. After two decades of research, the Department of Conservation and Natural Resources wants to change the statuses of 51 plants.