\\.\TER 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 and in their 

 place were mucka-mucka and other aquatic growths, backed 

 by the solid walls of trees and vines. 



FIG. 10.4. A BUTTERFLY MIMIC-KINO ANT ORCHID. 



Snake-birds ts were perched in solitary state at frequent 

 intervals along the banks, silent, sinister looking, craning 

 their necks out at us and either dropping quietly into the 

 water and sinking from view or flapping heavily upward. 

 Ordinarily their flight is very pelican-like; six or eight Haps, 

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

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



