In recent years, when Teacher Li worked at the Taiwan Amphibian Conservation Association, he conducted a special activity called the "Frog Census," for which he was responsible for planning the sampling areas and analyzing the results. This activity has been ongoing for nine years. The approach involved selecting one county each year, where over two hundred volunteers conducted surveys throughout the county at night. Volunteers paired up, wearing rain boots and cold weather clothing, and carried flashlights, thermometers, and other recording tools. Upon arrival at the sampling area, they first recorded the weather and temperature, and then documented the types, numbers, and forms of amphibians present in the area (such as adults or tadpoles, and if adults, their genders). After the volunteers concluded their surveys for the day, Teacher Li immediately compiled and analyzed the data,  sharing the results with everyone the following morning.

Since animal counts during amphibian surveys are influenced by weather and whether it's breeding season, short-term survey results may show fluctuating animal counts with significant variations. Therefore, in recent years, the association has utilized fixed monitoring points in critical frog habitats. Through averaging the counts, they estimate whether the species' trend is increasing or decreasing in recent years. For example, the survey results revealed a significant increase in the numbers of Emerald Tree Frogs and the invasive species Spot-legged Tree Frogs, while populations of the Central Formosan Toads and the Long-legged Frogs have been decreasing annually. However, there are many factors influencing amphibian populations, and it requires long-term data accumulation to discern trends.