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Idaho's 1948 Aerial Beaver Relocation: Parachuting 76 Rodents to Chamberlain Basin

other · 2026-10-01

In 1948, a crisis emerged for the Idaho Department of Fish and Game as postwar expansion near Payette Lake in McCall led to conflicts between humans and beavers. The beavers' dam-building activities harmed orchards, irrigation systems, farms, and water infrastructure. Seeking a humane resolution, officials aimed to relocate the beavers to a remote area. However, the selected location was too rugged for trucks, and previous attempts using mules and horses had resulted in heat exhaustion and fatalities among the beavers. Elmo Heter, a department staff member, suggested airlifting the animals. He and his colleagues created a wooden box with rubber fasteners that opened upon impact, utilizing surplus WWII parachutes. After successful tests with a dummy and an elderly beaver named Geronimo, they relocated 76 beavers, with 75 thriving in the Chamberlain Basin. Within two weeks, dam-building activity was observed. The relocation was labeled 'wildly successful,' and current populations are stable enough that counts are no longer necessary. It remains unclear if today's beavers are descendants of the 1948 group.

Key facts

  • In 1948, the Idaho Department of Fish and Game relocated beavers by parachute to resolve human-wildlife conflict in McCall, Idaho.
  • Postwar development around Payette Lake led to clashes as beavers damaged orchards, irrigation systems, farms, and water systems.
  • Elmo Heter, a department employee, proposed the aerial drop after mule and horse transport proved lethal due to heat exhaustion and stress.
  • The wooden transport boxes used rubber fasteners that stayed locked in midair and opened upon ground impact, and were attached to surplus World War II parachutes.
  • An elderly male beaver named Geronimo survived multiple test drops and was among the first released.
  • Of 76 beavers dropped, 75 survived to establish a population in the Chamberlain Basin; one died from a fall exiting its box.
  • Within two weeks of the drops, scientists observed dam-building and other beaver impacts in the area.
  • The relocation was considered 'wildly successful,' and the department no longer tracks population counts due to stability.

Entities

Artists

  • Elmo Heter
  • Geronimo

Institutions

  • Idaho Department of Fish and Game
  • Fish & Game Department
  • The Collector

Locations

  • Idaho
  • United States
  • McCall
  • Payette Lake
  • Chamberlain Basin

Sources