Pigeon keeping is known as a popular hobby in Old Delhi, among those who can afford it. Some pigeons are trained to fight, others are fast, some are noted for their endurance. On the other hand, recently there are still so many pigeon keepers have to follow a timetable so that flocks don't clash. The practice first gained popularity during Mughal rule, when the birds were used for communication, and when Shahjahanabad was first built there were rival pigeon clubs all over the city.