THE BIRDS OF NORTHERN THAILAND 193 



Gyldenstolpe and de Schauensee note that their specimens had the 

 irides dark brown ; the bill black ; the feet and toes dark reddish brown 

 or dusky lake. 



The adult male has the plumage generally soft blue-gray, with the 

 lores black, the chin, upper throat, sides of lower throat, and the ear 

 coverts soft chestnut. The adult female differs in having the chestnut 

 replaced by blue-gray. 



Order TROGONIFORMES 



Family TROGONIDAE 



harpactes erythrocephalus erythrocephalus (gould) 



Burmese Red-headed Trogon 



Trogon erythrocephalus Gould, Proc. Zool. Soc. London, 1834, p. 25 (Rangoon, 

 Burma). 



Harpactes erythrocephalus, Gyldenstolpe, Journ. Nat. Hist. Soc. Siam, 1915, 

 p. 232 (listed). 



Pyrotrogon erythrocephalus, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 

 1916, p. 105 (Doi Pha Sakaeng, Khun Tan). 



Pyrotrogon erythrocephalus erythrocephalus [partim], Gyldenstolpe, Ibis, 1920, 

 p. 606 ("Northern Siam" [partim}). 



Pyrotrogon erythrocephalus subsp., de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1929, p. 574 (Doi Suthep). 



Harpactes erythrocephalus intermedins, Chasen and Boden Kloss, Journ. Siam 

 Soc. Nat. Hist. Suppl., 1932, p. 234 (Doi Suthep). 



Harpactes erythrocephalus erythrocephalus, Deignan, Journ. Siam Soc. Nat. Hist. 

 Suppl., 1931, p. 163 (Doi Suthep) ; 1936, p. 92 (Doi Suthep).— de Schauen- 

 see, Proc. Acad. Nat. Sci. Philadelphia, 1934, p. 264 (Doi Suthep, Doi Chiang 

 Dao). 



Harpactes erythrocephalus erythrocephalus [partim], Riley, U. S. Nat. Mus. 

 Bull. 172, 1938, p. 163 (Doi Ang Ka, Doi Suthep, Doi Khun Tan, Doi Hua 

 Mot). 



The Burmese form of the red-headed trogon is a common resident 

 of the mountain evergreen from 2,500 to 5,500 feet, but probably it 

 reaches its eastern limit of range on the higher peaks of the Khun Tan 

 chain. Eisenhofer sent to Stockholm two males and a female, taken 

 in 1914 at Khun Tan. I have specimens from Doi Suthep, Doi Ang 

 Ka, and an unknown locality between Chiang Mai and Wiang Pa 

 Pao. 



This trogon is a silent bird, occurring, singly or in pairs, in damp, 

 dark forest and especially in cool ravines. Here it perches quietly 

 upon some low branch, its back to the observer, and one's first inti- 

 mation of its presence is often a bright crimson flash as it crosses the 

 trail to vanish again in the foliage beyond. 



I took a male, just out of the nest, on Doi Ang Ka, April 8; 

 since members of the Trogonidae are well known to have an extraor- 



