Clark's nutcracker (Nucifraga columbine), sometimes referred to as Clark's crow or woodpecker crow, derives its name from the explorer William Clark – an American frontiersman who won fame as an explorer by sharing with Meriwether Lewis the leadership of their epic expedition to the Pacific Northwest (1804–06). The nutcracker and the whitebark pine have a strange relationship. The tree's cones provide seeds for the nutcracker to eat. And, when the nutcracker buries some of the seeds for later, it "plants" a new forest of whitebark pines. Many other forest animals depend on the high-energy seeds, too. One Clark's nutcracker can bury about 35,000 whitebark pine seeds in a year. But the whitebark pine then takes at least 50 years before it produces any cones - it can then live for hundreds of years more.