The Delhi Metro seems to have hired a monkey in order to scare away other monkeys along the train route:
The Delhi Metro authorities say they have employed a large black-faced langur monkey to frighten away other monkeys who were worrying passengers.The monkey was kept on leash for a month at one of Delhi's biggest stations in the Kashmere Gate area. Its owner was paid $150 for its services. The step was taken after a couple of incidents in June when monkeys boarded the trains, scaring passengers. Thousands of simians roam the streets and are considered a public nuisance.