When the First Rain Falls... But the Frogs Stay Silent

For generations, villagers in northern Thailand knew that the first rain of the season would bring a familiar chorus  the calls of the “Ueng Phao” filling the forests and rice fields from dusk until dawn. That sound was never just background noise. It was a living signal that the forest was healthy, the soil was rich, and the water was clean. Today, that chorus is fading.

Ueng Phao known locally as “Khao” and scientifically as Glyphoglossus molossus is a native amphibian that spends most of its life hidden underground, emerging only during the rainy season to breed. This intimate rhythm with the seasons made it a symbol of ecological health in the communities of northern Thailand. When Ueng Phao thrives, the forest thrives.

Yet today, wild populations are in sharp decline. Overharvesting for food and the ongoing degradation of natural habitats have pushed this species to the edge. If left unaddressed, the loss of Ueng Phao would signal not only the disappearance of a species, but the unravelling of an entire ecosystem.

From Research Lab to Community Forest: A Model Built on Partnership

School of Agriculture and Natural Resources, University of Phayao has been working on this problem for over eight years. The “Ueng Phao Bank” project, led by Assistant Professor Kriengkrai Seetapan and the Fisheries Technology and Innovation team, operates under the royal initiative of Her Royal Highness Princess Maha Chakri Sirindhorn (RSPG Project) with one clear goal: bring the frogs back, together with the communities who depend on them.

The process is beautifully simple in principle. Villagers collect breeding pairs of Ueng Phao from their own community forests and bring them to the university. Researchers breed the frogs in controlled conditions, raising the tadpoles to healthy juveniles. When the young frogs are ready, they are released back into the exact community forest from which their parents came  a cycle of borrowing and returning that respects both nature and community.

          This year alone, over 40,000 juvenile frogs (from 40 breeding pairs) were released into four community forests: Ban Bua in Tambon Mae Ka, Ban So in Tambon Mae Na Ruea, Ban Sang in Tambon Ban Sang, and Ban Tha Champee in Tambon Tha Champee. Each release was timed to the early rainy season — the moment nature itself has always chosen for these animals to emerge.

More Than Just a Frog: Why Ueng Phao Matters

At first glance, Ueng Phao might seem like a small, unremarkable creature. But its role in the ecosystem is anything but small. As a natural pest controller, it feeds on insects that damage crops, quietly reducing the need for chemical pesticides in surrounding farmland.

As an amphibian, it is also one of nature’s most sensitive environmental monitors. Its permeable skin absorbs substances directly from the environment, making it highly responsive to changes in soil, water, and air quality. Scientists regard the presence of healthy amphibian populations as one of the clearest indicators of a functioning ecosystem. When Ueng Phao returns to a forest, it is the land itself saying: “I am well again.”

Beyond ecology, Ueng Phao carries deep cultural significance. It has been part of the food traditions, folklore, and seasonal rhythms of northern Thai communities for generations. Protecting this species means protecting not only a biological resource, but a living thread of cultural memory.

Conservation That Lasts: The Power of Shared Ownership

What makes the Ueng Phao Bank project truly distinctive is not the science it is the philosophy. The project’s motto, “The Faculty breeds, the community releases, conservation sustained together,” captures a fundamental truth: conservation only works when communities feel genuine ownership of their natural resources, not just passive observers of someone else’s project.

Through ongoing engagement, villagers who once harvested frogs freely now understand the limits of natural regeneration and actively manage their forests as sustainable food sources for future generations. The shift from consumer to steward has been the project’s most profound achievement.

On the night the first rain falls, if you listen carefully and hear the calls of Ueng Phao rising again from the forest that sound is not just a frog calling out. It is the sound of eight years of dedication, of communities and researchers working side by side, and of a forest quietly saying: I’m still here.