The Birmingham Zoo is loaning two of its otters to the Little Rock Zoo while the Alabama facility builds a new exhibit for the pair. One male and one female -- named Oscar and Opal -- are expected to stay in Little Rock for about a year or so. The Little Rock Zoo already keeps two otters, Buffalo and Willie. The zoo took in Buffalo - a female - after she was found orphaned on the Buffalo National River. Willie is a male from the Nashville Zoo.