Kokkarebellur Bird Sanctuary is located in Mandya, Karnataka. A naturally occurring sanctuary, such as an island, which protects species from getting hunted, predated or poached is called as a wildlife refuge. It is also known as a wildlife sanctuary. Being a protected area, it is a geographic territory within which wildlife is protected. 515 wildlife sanctuaries are present in India currently.
So, the correct answer is 'Mandya'.