Centropus chlororhynchos (Ati Kukula): The Unique Sri Lankan Coucal – By Bhanuka – eLanka Centropus chlororhynchos, commonly known as the Sri Lankan Green-billed Coucal or locally as Ati Kukula, is an extraordinary bird endemic to the wet zone forests of Sri Lanka. This elusive and striking bird, with its distinctive green bill and unique call, holds a special place in the island’s rich biodiversity. Often heard before it is seen, the Ati Kukula is a symbol of Sri Lanka’s tropical rainforests and an important part of the country’s avifaunal heritage. Physical Description The Sri Lankan Green-billed Coucal is a medium-sized bird characterized by its striking green bill, which sets it apart from other coucals. It has a robust, glossy black body, a chestnut-brown back, and a long, broad tail. The bird’s iridescent blue-black plumage glistens in sunlight, making it a beautiful sight against the lush green backdrop of Sri Lanka’s ...