An endangered (IUCN) and federally endangered Mount Graham red squirrel, Tamiasciurus hudsonicus grahamensis. This animal, named Lizzie, is one of only two captive animals of this species. She was brought in to the museum as an orphan along with a male squirrel, by USFWS, in 2004. There are now fewer than 100 MGRS living in the wild, making this one of the rarest mammals in North America.