Northern Portion of the Malay Peninsula. 21 



This bird is marked male and is probably au immature 

 bird of that sex. 



The sixth, sexed male, is similar in every way to the pre- 

 ceding, except that the black collar is less in evidence; the 

 " knuckle-dusters " are well marked. Wing 13'2 inches. 



The seventh and eighth birds are sexed female. Wing 

 13'2 and 12"2 inches, wing-speculum Ave'.l defined. In one 

 specimen the black collar is not very clear, but in the other 

 it is broad and extends well on to the breast. Back of the 

 neck in both specimens glossy greenish black. 



The evidence therefore tends to shew that the adult males 

 are entirely black beneath and that the immature males 

 are brown beneath with a black collar, but whether the fully 

 adult females ever become quite black beneath or remain 

 like the immature males is still uncertain. 



42. Dendrocycna javanica. 



Dendrocycna javanica (Horsf.); Salvad. toni. cit. p. 156. 



The Whistling Teal is common in Trang and on the 

 Langkawis, and indeed in the north of the Peninsula generally, 

 in swamps and rice-fields and on the larger rivers. 



Further south it is very much less common and is rarely 

 met with in the Federated Malay States, except on the 

 Perak and Pahang Rivers, where it is sometimes exceedingly 

 numerous. In Patani it was said to be a migratory bird, as 

 is probably true of Asarcornis leucoptera, arriving with the 

 breaking of the N.E. Monsoon in October and November -, 

 but its movements are probably only of a local character, 

 depending rather on the relative suitability of the feeding- 

 grounds in one district or another than on a true season 

 migration. 



Falcon iDiE. 



4-43. Circus ^ruginosus. 



Circus (Bruginosus (Linn.) ; Sharpc, Cat. Birds Brit. Mus. 

 i, p. 69 (1874). 



Langkawi, November and February, 



The Marsh-Harrier is fairly numerous in the winter 



