The once thriving captive-born southern white rhinoceros population is being threatened by their diet, according to new research. San Diego Zoo Global researchers predict that phytoestrogens in the rhinoceros’ food may be causing reproductive failure in the females.

As large, carnivorous mammals, spotted hyenas are well known for their competitive nature; however, recent work suggests that their clan structure has similarities to some primate social systems such as those of the baboon and macaque.

BOSTON, Jan. 24, 2012 /PRNewswire/ -- Winter is a great time to don your safari hat, escape the cold and take off on a grand expedition.

A recently released scientific paper authored by San Diego Zoo Institute for Conservation Research scientists shows the leading causes of death of the endangered California condor in the wild are human influenced, with lead poisoning being the primary factor in juvenile and adult birds.

Identifying species, separating out closely related species and managing each type on its own, is an important part of any animal management system.