Scientists search for colonies in the mountains.
In North Carolina, endangered Virginia big-eared bats are known from only two caves at Grandfather Mountain, where they hibernate. What has puzzled biologists for years is where these bats go in the summer to give birth. This spring a massive effort aims to answer that question.
About 12,000 Virginia big-eared bats are known to exist in four states and 400 of those hibernate in the Grandfather Mountain caves.