THE 



JOURNAL 



of' THE 



Natural History Society of Siam. 



Volume V. Bangkok. Number 1. 



THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM, 



BEING AN ACCOUNT OF THE BIRDS OF SlAM FROM THE HEAD OF THE GULF OF SlASI 



TO THE Malayan border, with references to the recorded occurrences 



AND A KEY TO THE INDIVIDUAL SPECIES. 



Br Herbert C. Robixson, c.m.z.s., m.b.o.u., Director of Museums, 

 Federated Malay States, 



AND 



Cecil BoDEX Kloss, f.z.s., m.b.o.u., Assistant Director of Museums, 



Federated Malay States. 



(With a map). 



INTRODUCTION 



By Herbert C. Robixsdx. 



The Kingdom of Siam from a zoological point of view contains 



such a mixture of different faunas that, unless dealt with in the most 



elaborate detail, any general list of its avifauna will convey little of 



zoogeographical value. In the extreme south its fauna is almost 



exclusively Malayan. Further north, to the west of the Chao Praya 



river, it is identical with that of Tenasserim, while that of the N. W. and 



the neighbourhood of Chiengmai approximates to the dry zone of Burma 



and the Shan States. The extreme N. and N.E., which are least 



known, probably contains a certain propoi-tion of Yunnanese birds. 



The central and eastern portions of the Kingdom are the only areas 



which contain forms that may be claimed as distinctively Siamese, and, 



with a few notable exceptions, these forms are not strongly ditierent- 



iated. The fauna of S.E. Siam, as shown by the collections made by 



one of us, is, as might be expected, largely Cambodian and French 



Indo-Chinese. (Ibis 1915, pp. 718-761). 



