The Javan Province is the most extreme province of the Sundaic subregion. it is the most isolated of the remaining Sundaic land masses and also the furthest from the Asian mainland; it is also smaller than the other provinces. As a result it is slightly less rich in species than Borneo and Sumatra but more distinct with some 24 endemic species confined to it and over 170 endemic sub-species recognized. Bali and the most eastern parts of Java have also been colonised by some Lesser Sundas species which have arrived nearby Lombok, the nearest island of the Wallacean sub-region.