WATER TRAIL FROM GEORGETOWN TO AREMU. 251 



The tide was blocked by the succession of falls and rapids, 

 and so at Upper Camaria the whole character of the vegeta- 

 tion was changed. Mangroves had vanished anrl in their 

 place were mucka-mucka and other aquatic growths, backed 

 by the solid walls of trees and vines. 



Fig. 104. A Butterfly HiitrcKiNG an Orchid. 



Snakebirds '* were perched in solitary state at frequent 

 intervals along the banks, — silent, sinister looking, craning 

 their necks out at us and either dropping quietiy into the 

 water and sinking from view or flapping heavily upward. 

 Ordinarily their flight is very pelicandike; six or eight flaps, 

 then a short scale, but when they once reach a high altitude, 

 they soar most gracefully with set wings, first in a wide, slow 



