THE TANA RIVER 



but not nearly in the same abundance; while such 

 creatures as the waterbuck, impalla, gazelles and 

 the smaller bucks seem either to be absolutely free 

 from the pests, or to have a very few. Whether this 

 is because such animals take the trouble to rid them- 

 selves, or because they are more immune from attack 

 it would be difficult to say. I have found ticks cling- 

 ing to the hair of lions, but never fastened to the 

 flesh. It is probable that they had been brushed off 

 from the grass in passing. Perhaps ticks do not like 

 lions, waterbuck, Tommies, et aL, or perhaps only 

 big coarse-grained common brutes like zebra and 

 rhinos will stand them at all. 



285 



