Nearly 300 endangered northern leopard frogs returned to the wild at the Columbia National Wildlife Refuge in Grant County at the end of August.

7 ‘Extinct’ Species That Eventually Reappeared ... Zanzibar Leopard A preserved Zanzibar leopard, which may have been caught on camera a few years ago. Image: Wikimedia Commons .

Northern leopard frogs are rapidly disappearing from their native ranges in Washington, Oregon, and western Canada. In Washington, the species has been listed as endangered since 1999, Oregon Zoo ...