I 



KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 8- 73 



I saw large flocks of them flying över Bangkok and they were very abundant round 

 the town and along the Menam Chao Phaya river. Also at Tha Law it occurred 

 in great numbers on the large swamps and marslies wliicli surround this place. 



187. Bublllcus coromandus Bodd. — The Cattle Egret always accompanied 

 the great herds of buffaloes, which are kept by the natives, and I often observed 

 some on the backs of the animals together with specimens of the Siamese Mynah 

 [Aelhiopsar grandis Moore). It also occurred at Tha Law and on the rice-fields but 

 liere it was not so common as the Smaller Eget {Herodias intermedia Blyth.) 



188. Ardeola bacchus Bp. — The winter plumage of Ardeola bacchus Bp. and 

 that of Ardeola grayi Syke.s. is very similar and it is nearly impossible to distinguish 

 the two species from each other, but according to specifical characteristics I believe 

 the specimens in my collection to belong to Ardeola hacchus Bp. It is by no means 

 impossible that Ardeola grayi Sykes. is also to be found in Siam. When flying 

 they look quite like the ruffs {Pavoncella pugnax L.) and it is only when they are 

 alarm ed that they get a Heron-like appearance. 



J" 171 1912 Sakerat. J" Va 1912 Den Cliai. 



Lengtli -=480 mm. Length =500 mm. 



Wing =198 » Wing =230 > 



Culmen = 68 » Culmen = 68 » 



189. Dupetor flavicollis Lath. — There is only a male specimen of the Black 

 Bittern in my collection, and this was obtained at a small pool near Bång Hue Hom 

 on the 25tli of March. When I passed some small swamps in Central Siam on my 

 way by rail to Utaradit I observed some Bitterns, probably belonging to this species. 

 During my stay at Tha Law I never observed them, though that place ought to 

 have been a splendid home for Bitterns. 



J* --'/-i 1912 Rang Ilue Hom. 

 Length =575 mm. 

 Wing = 200 » 

 Tail = 73 * 

 Culmen = 82 * 



Fam. Anatidjv. 



190. Dendrocygna javanica Horsf. — There are only a few species of ducks 

 inhabiting Siam and I only observed two kinds during my journey. The most com- 

 mon among these was the Whistling Teal and it occurred both along the rivers and 

 in the swamps. Especially in the Menam Chao Phaya river flocks were sometimes 

 met with, always together with the Cotton Teal {N ettopus coromandelianus Gm.), but 



K. Sv. Vet. Akad. Handl. Band. 50. N:o 8. 10 



