They have to be leaving some kind of signs of their passing , try climbing a tree and looking for fresh trails . The trails will most likely show you their preferred direction of travel from the beds or the nearest waterhole , and staking out a waterhole can be the most productive tactic when the pattern cannot be determined . Sometimes the aerial view is the only one that will reveal this , and with luck you may accidentally climb right over the busiest trail . At the very least you'll have some idea of where they are going . Look for poo or other indicators too .