The smaller islands include the eastern part of the Indonesian archipelago , including the island of Sulawesi , the Moluccan islands ( the Indonesian provinces of Maluku and North Maluku ) and islands of Lombok , Sumbawa , Sumba , Flores , and Timor , often known as the Lesser Sundas . The ecozone includes Australia , the island of New Guinea ( including Papua New Guinea and the Indonesian province of Papua ) , and the eastern part of the Indonesian archipelago , including the island of Sulawesi , the Moluccan islands ( the Indonesian provinces of Maluku and North Maluku ) and islands of Lombok , Sumbawa , Sumba , Flores , and Timor , often known as the Lesser Sundas .