The Hairy Houdini: Remembering Ken Allen, San Diego Zoo’s Legendary Escape Artist

In the storied history of zoos worldwide, few animals have captured the public’s imagination quite like Ken Allen, the incredible escaping orangutan of San Diego Zoo. Born in captivity on February 13, 1971, Ken Allen would go on to become one of the most famous residents in the zoo’s history, earning worldwide attention and admiration for his uncanny ability to outsmart his keepers and break free from his enclosure.

Ken Allen’s story began with a rocky start. As a newborn, he was rescued by zookeepers Ken Willingham and Ben Allen (from whom he got his name) after his mother attempted to smother him. This early brush with adversity may have sparked the resourcefulness and determination that would later define his life.

Even as a young orangutan, Ken Allen showed signs of his future escape artist tendencies. Zoo staff reported that as an adolescent, he would regularly unscrew the bolts of his cage, explore the nursery at night, and then return in the morning, carefully reassembling his enclosure before the keepers arrived. This knack for problem-solving and mischief was just a preview of what was to come.

The summer of 1985 marked the beginning of Ken Allen’s reign as the “Hairy Houdini,” as he was later dubbed. On June 13, the 250-pound Bornean orangutan made his first headline-grabbing escape. He managed to scale the the massive wall of his enclosure, which had been thought to be escape-proof, and calmly strolled around the zoo. Visitors were treated to the surreal sight of an orangutan peacefully observing other animals as if he were just another tourist.

This first escape was followed by two more in quick succession, on July 29 and August 13 of the same year. Each time, Ken Allen displayed the same nonchalant attitude, never showing aggression towards humans or other animals. His peaceful demeanor during these escapes only added to his charm and growing fame.

Zoo officials were left baffled and increasingly frustrated. They began surveillance of Ken’s enclosure, hoping to catch him in the act and discover his escape route. But Ken Allen proved to be more clever than they anticipated. He seemed to be aware that he was being watched and refused to reveal his secrets.

In a desperate attempt to uncover Ken’s methods, zookeepers resorted to going “undercover,” disguising themselves as tourists. But even this elaborate ruse failed to fool the intelligent ape. To make matters worse, other orangutans in the enclosure began following Ken’s lead, resulting in even more escapes.

The situation reached a crescendo when Ken Allen found a crowbar left behind by workers in his enclosure. In a display of tool use and cooperation that would have delighted primatologists, he passed the crowbar to his companion Vicki, who used it to pry open a window, allowing Ken to make yet another escape.

While the zoo ramped up security measures, Ken Allen wasn’t done yet. In 1987, two years after his initial string of escapes, he found another opportunity when his enclosure’s water pump clogged, causing the moat to dry up. Before anyone noticed the malfunction, Ken simply walked across the dry moat and hoisted himself onto the rocks outside the enclosure.

This escape proved to be his most daring yet. Ken wandered further into the zoo than ever before, making his way towards the lion pens. Along the way, he stopped to pose for photos with astonished tourists, seemingly enjoying his newfound freedom and the attention it brought. It was a surreal scene – visitors snapping pictures with a 250-pound orangutan as if he were just another zoo attraction.

The situation quickly turned tense when security guards arrived, guns at the ready. Ken, perhaps sensing the danger, bolted. A zoo gardener spotted him and helped clear the area. Veterinarians managed to corral the escaped ape back to his enclosure before he reached the lion pens, finding him “nervous and agitated” but thankfully unharmed.

This video has lots of contemporary footage of Ken Allen, his escapes, and his road to fame.

As Ken Allen’s exploits gained national attention, he became a bona fide celebrity. T-shirts and bumper stickers bearing slogans like “Free Ken Allen” began appearing around San Diego. He even inspired a fan club called the “Orang Gang,” composed mostly of retirees who followed his adventures with enthusiasm. The club published a newsletter, “The Orang Gang News,” to keep Ken’s fans updated on his latest escapades.

Ken’s story captured the imagination of locals and inspired creative tributes. San Diego psychiatrist Dennis Gersten (now known as David Gersten) was so moved by Ken’s story that he wrote and recorded “The Ballad of Ken Allen.” The catchy tune, with lyrics celebrating Ken’s escape attempts, became a local hit and was even sold on 45 rpm records at the zoo.

The zoo, while undoubtedly frustrated by the constant escapes, couldn’t help but capitalize on Ken Allen’s fame. They began selling T-shirts featuring headlines about his escapes, turning their security nightmare into a marketing opportunity.

But the escapes couldn’t go on forever. The zoo invested significant resources in trying to Ken-proof the orangutan enclosure. They hired experienced rock climbers to identify every possible handhold and foothold in the exhibit. Electric wires were installed, and the enclosure wall was extended. In total, the zoo spent around $40,000 to $45,000 on these security upgrades.

The zookeepers also tried a different approach to turn Ken Allen’s wanderlust into just lust, as the zoo’s spokesman put it. They introduced female orangutans into his enclosure, hoping that companionship might distract him from his escape attempts. However, this backfired when Ken’s new friends began to follow his example. In one memorable incident, two female orangutans, Jane and Kumang, used a squeegee left behind by window washers to climb the enclosure wall and make their own bid for freedom.

Eventually, the enhanced security measures seemed to work, and Ken Allen’s great escapes came to an end. But his legacy as the “Hairy Houdini” was firmly established. Time magazine later listed Ken Allen’s story as one of the Top Eleven Zoo Escapes.

Ken Allen’s later years were quieter, but he remained a beloved figure at the San Diego Zoo. Sadly, in the winter of 2000, he began showing signs of illness and was diagnosed with B-cell lymphoma. On December 1, 2000, at the age of 29, Ken Allen was euthanized. His passing was mourned by his many fans, with the Orang Gang even holding a candlelit vigil in his honor.

Years later, Ken Allen’s escapes have taken on an almost mythical quality. Some visitors who witnessed his adventures share stories of the orangutan casually shaking hands with people and “having a good time” before running off when keepers tried to recapture him.

Today, Ken Allen is remembered fondly in San Diego Zoo history. A memorial stands in his honor, ensuring that future generations of zoo visitors will know the story of the Hairy Houdini. And who knows? Perhaps, as some fans like to imagine, Ken Allen pulled off one final, grand escape. Maybe somewhere out there, an elderly orangutan is sipping a cool drink on a Mexican beach, reminiscing about the summer of ’85 when he became the world’s most famous escaping ape.

Sources: 1, 2, 3