Not long ago, golden frogs were on the brink of extinction.
The story began in the late 1980s when an invasive fungus called Batrachochytrium dendrobatidis (Bd) spread through Central America, eventually reaching Panama. The fungal spores, which travel easily through water, quickly affected the golden frogs, who live near streams.
While Bd is harmless to humans, it has a devastating impact on amphibians like the golden frog. The fungus infects the frogs’ skin, disrupting their electrolyte balance, which leads to heart failure and death. This disease, called chytridiomycosis, reached Panama’s last remaining population of golden frogs in El Valle de Anton in 2004. By 2009, the frogs had completely disappeared from the area.
Although the Panamanian golden frog (Atelopus zeteki) species was not completely lost, it faced an uncertain future. Wildlife biologists from the Smithsonian-affiliated Panama Amphibian Rescue and Conservation Project (PARC) worked tirelessly to breed golden frogs and related species in controlled environments. Only recently have the lab populations stabilized enough for the next stage in their recovery.
“We care for some of the most endangered amphibians in Panama, and now we are entering a new phase of our work to study the science of rewilding”, said Roberto Ibañez, director of PARC.
The reintroduction process is not easy. Bd still exists in several regions of Panama, posing a significant threat to the frogs. During the initial 12-week soft release, approximately 70 of the 100 golden frogs died from the disease. However, the surviving frogs were eventually rewilded, and the data collected will help conservationists understand how the disease works.
“These crucial data will guide our future conservation strategies”, said Brian Gratwicke, a conservation biologist. “Our earlier models suggest there are potential release sites that could serve as climatic refuges – places that are suitable for the frogs but too hot for the fungus”.
For those who are concerned about the future of the golden frog, the track record of PARC provides reassurance. Last year, the team successfully released three other frog species back into their natural habitats: the crowned tree frog (Tripion spinosus), Pratt’s rocket frog (Colostethus pratti), and the lemur leaf frog (Agalychnis lemur).














































