If you spend a day in one of the Project Tiger national parks, you may or may not see a tiger, but the one thing that you will learn about are alarm calls. Tourists like us move along designated tracks on a jeep inside the forest. Tigers seldom cross these paths. So the best way to find out whether a tiger is nearby is to listen to the jungle.
Of the three animals which issue alarm calls, the spotted deer Cheetal (Axis axis) and the gray langur (Semnopithecus entellus) can be seen in the photo above, and the sambar deer (Rusa unicolor) is in the featured photo. The cheetal thrive in Pench National Park. They are easily spooked. Sometimes you see a herd grazing near a track, looking up at you warily as you pass. But very often you see them already running. A naturalist once told me that this is a good sign, because it shows that they are not habituated to humans. Cheetal alarm calls are the first thing you hear when a leopard or tiger is sighted. They may soon be followed by the alarm call of langurs. Usually, when you hear this, your guide will drop everything else and rush towards the sound. Since the calls carry easily in the jungle, you will find that there are several jeeps which arrive at the source of the calls.
Tiger spotting requires patience and persistence. Sometimes the calls stop, and you do not know whether that is because the predator has stopped moving, or because it was a false alarm. The lore amongst guides is that cheetal calls could be false alarms sometimes, but the alarm call sounded by sambar deer is always correct. I saw sambar approaching water holes on two occasions. Both times they were so cautious that it was a wonder. The featured photo shows a lone sambar moving between trees at the edge of a clearing around a waterhole. It spent almost twenty minutes walking a distance of about a hundred meters. The second time I saw a group coming to a large pond. There were wary groups of monkeys drinking water, taking turns to keep watch as the rest of the group drank. A couple of spotted deer were also drinking water (see photo above). They were quiveringly tense as they drank, but they walked to the water very quickly, drank, and walked away again.
The sambar are different, they took a long time to approach the water. Then after drinking, they waded into the water (photo above). Even inside the water they were extremely cautious: scanning their surroundings with every step they took. The two scouts were soon joined by others, including young. Their coats were matted, as if they were already wet. Sambar like to wade, but they were so wary that they stood in knee-deep water until the light began to fade and we were forced to leave.
From the difference in behaviour that I saw, I could believe our guide when he said that a sambar’s alarm call is always correct.