Thrissur: A panel constituted to work on demarcating ecologically-sensitive zones around national parks and wildlife sanctuaries in the state on Monday visited the Silent Valley National Park in Palakkad and held deliberations with the public.

The panel members, comprising MLAs T N Prathapan, N Shamsudeen and state wildlife board officials, decided to recommend to the Union ministry of environment and forests to declare the entire 148-sq km buffer zone around the park as an ecologically-sensitive zone.