Interestingly, the zoo has become known for animal escapes. The most famous animal to do so was an orangutan named Ken Allen (1971-2000). In the summer of 1985 he escaped three times and wandered peacefully in the park looking at other animals. The zoo installed cameras and even sent in personnel disguised as tourists, but Ken was on to them. Finally, the zoo hired rock climbers to find routes out of the enclosure to figure out how Ken, who became known as Hairy Houdini, escaped. In recent years, a koala, wolf monkeys and a couple of hyenas have also escaped. All were captured and safely returned to their enclosures.