Increasingly forced to do triage on endangered species, zoos are urged to work more closely with in situ conservation

ST. LOUIS — With fluorescent yellow eyes and tufts of hair sticking straight up behind their ears, Bonner and Etienne look like slightly crazed old men.

These riotous and chatty lemurs — known for elaborate rituals that include grooming and braying — once ranged across eastern Madagascar.

Now scores of these black-and-white ruffed lemurs are being bred here at the St. Louis Zoo and at other zoos across the United States as part of a broader effort to prevent their extinction.

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