Abstract
Black bear (Ursus americanus) reproduction is critically linked to female nutrition. In highly productive females, litters include up to six cubs. Little is known about the yearly reproductive success of individual females that produce abnormally large litters. Further, survival of offspring born among so many siblings is poorly known. We report on a female bear in highly agricultural habitat that produced two successive litters of quintuplets in alternate years during a period of maternal net growth from Feb. 2005 through Mar. 2007.
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