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        As curator of Behavioral Husbandry,   visitors see animals doing something   or “toys” that are specifically designed
        Sullivan works collaboratively with the   interesting. Here are some examples:  to draw out a species-typical, healthy
        animal care staff to identify natural   •  Food is hidden throughout an animal’s   behavior. These include large balls
        behaviors they want to see in animals and   habitat, which draws it out into the   for polar bears, frozen fish encased
        devise strategies to draw those behaviors   open to search for it. Animals do what   in ice blocks for California sea
        out of animals. “We always try to find   they evolved to do—forage for food.  lions, and plastic octopuses and
        new ways to stimulate visibility and   •  Logs or browse are left in an animal’s   pool noodles for dolphins. The
        sometimes the best way to do that is to   habitat. An insectivore, like a sloth   animals’ antics entertain viewers.
        stimulate activity,” he said. With increased   bear, will use its powerful claws to rip   •  Bird perches and other “exhibit
        activity, animals receive the health benefits   up the wood in full view of visitors.    furniture” are positioned in habitats
        of exercise and mental stimulation and    •  Animals receive enrichment devices   where the animals have some cover,
                                                                                    but can still be seen by visitors.
                                                                                  •  Live prey is released into an animal’s
                                                                                    habitat. Asian small-clawed otters
                                                                                    chase live fish around their habitat
                                                                                    in TROPIC WORLD: ASIA.
                                                                                  •  Animals are challenged to problem-
                                                                                    solve. Peanut butter is smeared up
                                                                                    high on a wall. Using a long stick as
                                                                                    tool, an orangutan will scrape the paste
                                                                                    off the wall and lick it off the stick.
                                                                                  •  Timed feeders dispense morsels of
                                                                                    kibble or other foods at random times
                                                                                    during the day. “The feeders drive
                                                                                    the animals’ transit from one place
                                                                                    to another,” said Sullivan. “In doing
                                                                                    so, they make themselves very obvious
                                                                                    to the guests who see the animals and
                                                                                    some really cool behavior.” To reach
                                                                                    a timed feeder installed in TROPIC
                                                                                    WORLD: ASIA, gibbons climb down
                                                                                    from the tree canopy and walk across
                                                                                    the habitat floor. Adding three timed
                                                                                    feeders to the gorilla habitat increased
                                                                                    their foraging activity by 50 percent.

                                                                                  The animal enrichment program is
                                                                                  made possible in part by support from:
                                                                                  The Kainz Family Foundation and
                                                                                  Mr. and Mrs. Walter W. Becky II.






        Above: Animal care specialists use succulent, fresh fruit treats to lure birds down
        from their high perches and into public view.







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