The Taimyr herd of migrating Siberian tundra reindeer ("R. t. sibiricus") in Russia is the largest wild reindeer herd in the world, varying between 400,000 and 1,000,000. What was once the second largest herd is the migratory boreal woodland caribou ("R. t. caribou") George River herd in Canada, with former variations between 28,000 and 385,000. As of January 2018, there are fewer than 9,000 animals estimated to be left in the George River herd, as reported by the Canadian Broadcasting Corporation. "The New York Times" reported in April 2018 of the disappearance of the only herd of southern mountain caribou in the contiguous United States with an expert calling it "functionally extinct" after the herd's size dwindled to a mere three animals.