The Sundarbans, the world’s largest mangrove forest and a UNESCO World Heritage Site, supports at least 300 bird species, including 28 globally threatened species. It holds the only known resident breeding population of the Critically Endangered Masked Finfoot (40–80 pairs), making it globally irreplaceable. Other threatened species include Near Threatened Lesser Adjutant and Mangrove Pitta. At SCOPE, we monitor the Masked Finfoot and avifauna across ecological zones, assess threats, and work with communities and government to safeguard this unique ecosystem.