07/16/2026
In 1955, a disgruntled employee of the Ahwahnee Hotel intentionally introduced some American bullfrogs into the concrete reflection pond in front of the hotel, with the intent that the incessant and loud grunting calls of the frogs would disturb hotel guests and cause complaints to senior staff.
This "prank" resulted in a devastating invasive species effectively wiping out numerous other aquatic species in Yosemite Valley, due to the bullfrogs' large size, voracious appetites, and highly successful breeding.
In the 1990s, Yosemite began what would become a two decade effort to eradicate these bullfrogs from the Valley. By 2019, that goal was achieved, and the park began reintroduction efforts for a number of the species (mostly smaller frogs) the bullfrogs had wiped out.
Park scientists also began a program with the San Francisco Zoo to introduce endangered California red-legged frogs (made famous in Mark Twain's "The Celebrated Jumping Frog of Calaveras County") into the protected meadows of Yosemite Valley as a way to better conserve the species.
The program has been, by all accounts, a success. In the spring of 2026, the 10,000th captive raised red-legged frog was released, and these red-legged frogs appear to be well established.
Seen here, San Francisco Zoo director of field conservation Dr. Rochelle Stiles, joined by Yosemite aquatic ecologist Dr. Rob Grasso and a group of Yosemite Conservancy supporters, perform one of the final frog releases for the year in Cooks Meadow.
Further details of the story, including 360° interactive VR views from Virtual Yosemite, can be seen at:
https://www.virtualyosemite.org/virtual-tour/
https://www.virtualyosemite.org/virtual-tour/
https://www.virtualyosemite.org/virtual-tour/
©2026 Photography by Scott Highton