State : Arunachal Pradesh, the north eastern state of India. Locate : The Itanagar Wildlife Sanctuary is actually situated in Naharlagun in Arunachal Pradesh. Best time to travel : October to April. Know Itanagar Wildlife Sanctuary in Arunachal Pradesh. Itanagar Wildlife Sanctuary in Arunachal Pradesh is spread over an area of about 140.30 sq. km with rare and varied species of flora & fauna. Itanagar Wildlife Sanctuary Arunachal Pradesh is actually in Naharlagun, the other part of Itanagar, the capital city of Arunachal Pradesh.