Stripes as Fingerprints: How Andhra’s Forests Are Counting the Big Cats

From the depths of the Nallamala range, wildlife experts deploy high-tech camera traps to track the elusive tiger population in a massive, three-phase census.

Deep within the rugged terrains of the Nallamala, Lankamala, and Seshachalam forests, the forest department has wrapped up a complex, high-stakes surveillance operation. Between April 15 and May 30, a specialized team—as documented in an original article by the ETV Bharat Andhra Pradesh team—deployed a network of 260 sophisticated trap cameras across 130 strategic locations. This mission, the third and final phase of the national tiger census, represents a massive leap in how we monitor these apex predators in the wild.

The census process is far more rigorous than mere visual spotting. To ensure accuracy, the forest staff divided the task into distinct phases: starting with a primary survey of carnivores last December, followed by an assessment of the herbivore population, and concluding with the camera-trap grid. By expanding the forest ranges from 12 to 19, officials have tightened the net, placing sensors 40 centimeters high along known animal pathways to capture movement with precision.

The Science of the Stripe

The core of this operation relies on a biological reality: no two tigers possess the same stripe pattern. Just as human fingerprints are unique, a tiger’s coat serves as a permanent, natural ID. Once the cameras—which reset every 15 seconds—capture an image, the data is funneled to the Tiger Reserve Bio-Lab in Srisailam. There, experts utilize advanced software like "Wild ID" and capture-recapture models to differentiate individual animals.

This technical rigor is essential because the territory of a single predator is vast. A tigress typically claims about 20 square kilometers, while a male’s range can span up to 100 square kilometers. By analyzing these movements alongside the physical evidence gathered—such as pugmarks, scat, and claw marks on trees—the forest department can effectively map the presence of tigers, leopards, and other rare species inhabiting these protected landscapes.

Why it Matters: Beyond the Numbers

This granular tracking is about more than just maintaining a registry; it is a vital metric of forest health. When the top of the food chain is thriving, it indicates a stable habitat, sufficient prey density, and minimal human-animal conflict. The systematic use of technology in Andhra Pradesh’s forests underscores a broader shift in Indian wildlife conservation: moving away from speculative estimates toward data-driven, photographic verification.

As the data currently undergoes final analysis, the findings will be critical in shaping future policy for the Nallamala ecosystem. The success of this census, published in early June, highlights how modernized monitoring can help us coexist with some of the planet’s most elusive creatures. By understanding their spatial patterns and population density, we are effectively securing the future of the biodiversity hotspots that sustain our wild heritage.