This 23 March 2020 video says about itself:
Monkeys Sound Alarm of Nearby Tiger | Life | BBC Earth
These langur monkeys are on high-alert for any sign of predators – but in a forest full of distraction, it’s almost impossible to tell how close the danger is.
Nearly 15,000 miles of new Asian roads will be built in tiger habitat by mid-century, deepening the big cat’s extinction risk and highlighting the need for bold new conservation measures now, according to a new study: here.