Long Valley is the largest freshwater agricultural wetland remaining in Hong Kong. It is an important habitat for local biodiversity especially birds and amphibians. Over 50% and 70% of the bird and amphibian species of Hong Kong can be found in Long Valley respectively. In the lecture, the ecological importance of this wetland are introduced. How to strike a balance between farming and biodiversity conservation are also discussed.

Students of the Residential Colleges have planted and harvested rice in Long Valley since 2013. They taste the hardship of producing rice and hopefully be more graceful to the farmers. Each student participating in this voluntary work gets a pack of rice grown in Long Valley afterwards.