A Problem, a Plane, and Seventy-Five Beavers Who Survived

There is something both absurd and admirable about the story of the parachuting beavers—a tale that begins with a practical problem and ends with seventy-five rodents descending from the sky into the Idaho wilderness, their wooden boxes snapping open on impact, their instincts immediately taking over. It is a story that could only have happened in the optimistic, improvisational years after World War II, when surplus military equipment met conservation ambition and a man named Elmo Heter had an idea that was as strange as it was effective.

The problem was straightforward. In the 1940s, the town of McCall, Idaho, was growing, and beavers were in the way. The animals, valuable for their role in maintaining wetlands, were damaging property and creating conflicts with new residents . The solution was relocation—moving the beavers to the remote Chamberlain Basin in central Idaho. But getting them there was another matter. The journey overland was long, hot, and stressful for the animals. Beavers are intolerant of heat and prone to stress; older individuals become “dangerously belligerent,” as Heter later wrote . Horses and mules, loaded with struggling, odorous beavers, became “spooky and quarrelsome” .

Heter, an employee of the Idaho Fish and Game Department, hit upon an idea. What if the beavers could fly? Not literally, but in boxes attached to surplus World War II parachutes, dropped from a small plane into the meadows of the Chamberlain Basin . The plan required a container that could hold two beavers securely during flight but open on landing, allowing the animals to escape. Heter experimented with a woven willow box, but abandoned it after realizing the beavers might chew their way out in mid-air .

The final design was two lidless wooden boxes fitted together like a suitcase, with ventilation holes and an intricate rope binding that held the box shut until it landed, at which point the collapsed parachute triggered the hinges to snap open . To test the system, Heter needed a volunteer. He found one in an older male beaver named Geronimo, who endured a series of practice drops from a plane. “He finally became resigned, and as soon as we approached him, would crawl back into his box ready to go aloft again,” Heter wrote .

On August 14, 1948, the first drop was made from a twin-engine Beechcraft Travel Air . Over the following days, seventy-six beavers were parachuted into the wilderness. One died when a lashing broke and he fell from his box before it landed; the rest survived . They went to work immediately, building dams and constructing lodges. By the following year, they had established territories and were thriving .

The operation was considered a success. Each drop cost just seven dollars per beaver, and most of the parachutes were recovered and reused . The descendants of those beavers, according to later accounts, still live in the area today . Geronimo, the test pilot, was given a “priority reservation” on the first ship into the hinterland, accompanied by three young females .

The story has been retold many times since, in books and articles and podcasts, for reasons that are not difficult to understand. It is funny, improbable, and oddly touching. It is a reminder that conservation is not always a matter of grand policy or scientific precision; sometimes it is a matter of a man with a problem, a plane, a surplus parachute, and a willingness to try something no one has tried before. The beavers did not know they were part of an experiment. They only knew that when the box opened, there was water to dam and trees to fell and a new home to build.

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Sources:

· Conservation Evidence Journal · National Geographic · Smithsonian Magazine · The Spokesman-Review · Google Books