The Endemic bird Numbers in Javan Province

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.

Similarly The Avifauna Geographical

The consequences of this geological history are that the bird faunas of the Australo-Papuan islands share many common features and are mostly Australian in origin. Similarly the bird faunas of the Sundaic are Asian (oriental) in origin. The Wallacean islands have a hotchpotch of species derived ffrom both the oriental an Australian zoogeographical region but with many endemic forms which have evolved on the different ilands as a result of their long isolation.

The Sundaic islands of Borneo, Sumatra and Java together with the Malay Peninsula share about onto the Asian mainland nor cross to adjacent Wallacea and this gives the sundaic area sufficient zoogeographical distinction to be classed as a separate faunal sub-region.