The abundance of greenery makes Kerala an avian paradise. Over 500 species of birds-both resident and migratory- can be found in the lush green tropical forests, numerous freshwater and brackish lakes, and waterlogged paddy fields of the state. From the Kol lands (marshlands and open paddy fields) surrounding the town of Thrissur to the Thattekkad Bird Sanctuary in Ernakulam, Kerala abounds at birding sites. November to February is the best time to spot migratory birds.