The Provinces of Thailand 



10 



57 



Note. — With increase of population, there has in recent years been 

 recurrent talk of dividing each of the provinces of Chiang Rai (36) 

 and Chiang Mai (35) into two. The new province to be carved from 

 Chiang Rai would probably be named Phayao, while that withdrawn 

 from Chiang Mai would probably be called Chaiya Prakan. 



The hypothetical Province of Phayao would possess an avifauna 

 inseparable from that of the then restricted Province of Chiang Rai. 



The hypothetical Province of Chaiya Prakan, however, which would 

 correspond with that part of the present-day Chiang Mai that falls 

 into the watershed of the Mae Khong, would show an avifauna very 

 different indeed from that of the then restricted Province of Chiang 

 Mai, drained by the system of the Chao Phaya. 



