From the Telegraph:
At the moment wildlife agencies frequently spend tens of thousands of pounds using cameras to monitor their presence at just one site.
Such surveillance is essential to determine whether numbers are rising or falling, and to locate the strongholds that humans should leave alone.
However, now Indian experts have discovered that mapping tiger paw prints and their faeces together produces results that are just as good as using cameras.
The method costs less than a tenth that of the camera approach and takes a third of the time.
Dr Yadvendradev Jhala of the Wildlife Institute of India, who led the study, said: “Tigers are cryptic, nocturnal and occur at low densities so they are extremely difficult to monitor.
“Unless we know how many tigers are left in the wild, and whether their numbers are increasing or decreasing, we will not be able to conserve them.”
Tigers are among the most threatened top carnivores in the world, with less than 3,200 left in the wild across the globe.