California red‑legged frog returns

Frog recovery stories can sound small. This one really isn’t. Yosemite and its partners just marked the release of the 10,000th California red-legged frog after a decade-long effort to bring the species back to the park, where it had been gone for about 50 years. That turns a symbolic conservation project into something more concrete — a real test of whether a missing native animal can be restored to one of the country’s most famous landscapes. (wildlife.ca.gov) ### What frog are we talking about? The California red-legged frog is the largest native frog in the western United States, and it’s the species made famous by Mark Twain’s “Celebrated Jumping Frog” story. It lives in ponds, pools, streams, and wet meadows, which makes it a pretty good indicator of whether a valley’s riparian(wildlife.ca.gov)ical work. (nps.gov) ### Why did it disappear from Yosemite? The short version is that Yosemite changed, and the frog paid for it. Park materials point to invasive American bullfrogs as the clearest cause, because bullfrogs prey on and outcompete native frogs. But that wasn’t the whole problem. Artificially high raccoon populations — boosted by open refuse sites decades ago — also hammered frog populations, and (nps.gov)e than they used to be. (nps.gov) ### What happened this week? On May 7, 2026, Yosemite, the California Department of Fish and Wildlife, the U.S. Fish and Wildlife Service, Yosemite Conservancy, and San Francisco Zoo & Gardens marked a milestone inside the park: the release of the program’s 10,000th frog. That number includes years of captive breeding, rearing, and releases tied to a recovery effort that has been running sin(nps.gov)oof that the program stuck with the long middle, which is usually where restoration projects fade out. (wildlife.ca.gov) ### Why did this take 10 years? Because reintroducing amphibians is slow even when things go right. You need the habitat to be good enough, the predators to be manageable, the release sites to hold water in the right way, and the animals to survive long enough to breed. Yosemite started with a plan to reintroduce thousands of(wildlife.ca.gov)both the machine and the fuel line at the same time. (nps.gov) ### Did the frogs actually establish themselves? That’s the key question, and the answer now looks much better than it did a few years ago. In 2024, park officials said ecologists had found a new generation of red-legged frogs in Yosemite Valley, including eggs in ponds and meadows — the first documented breedi(nps.gov)e the landscape on their own terms. (nps.gov) ### Why is San Francisco Zoo involved? Because some species recover only if someone handles the early life stages very carefully. The zoo has been part of the breeding and head-starting work since the beginning, alongside federal and state agencies and Yosemite Conservancy. That kind of partnership(nps.gov)g work that would be hard to pull off in the field alone. (wildlife.ca.gov) ### So is the frog “back” for good? Not guaranteed. A milestone is not the same thing as a finished recovery. The species is still federally threatened, and Yosemite still needs a self-sustaining population that can keep breeding without constant human help. But this is the part conservation projects rarely get to say out loud: after years of habitat work and releases, the animal is no longer just missing. (wildlife.ca.gov) ### Bottom line The real news isn’t that one frog showed up. It’s that Yosemite now has enough evidence — 10,000 releases, repeated work since 2016, and documented breeding — to argue that a vanished native species is genuinely on its way back. (wildlife.ca.gov)