In this March 2, 2010 photo provided by U.S. Fish and Wildlife Service biologist Susi von Oettingen  bats are seen in a bunker in New Hampshire. Oettingen is part of a team that will study the habitat of the bats over the winter. (AP Photo/U.S. Fish and Wildlife Service, Susi von Oettingen)

Photo by: Susi von Oettingen

In this March 2, 2010 photo provided by U.S. Fish and Wildlife Service biologist Susi von Oettingen bats are seen in a bunker in New Hampshire. Oettingen is part of a team that will study the habitat of the bats over the winter. (AP Photo/U.S. Fish and Wildlife Service, Susi von Oettingen)