Staff at a computer company in South Africa are using pigeons to transfer data between offices because it it quicker than broadband. They say that it takes six hours to transfer four gigabytes of encrypted data from Durban to their call centre 50 miles away. In contrast it takes a pigeon with a memory card attached to its leg, just an hour to make the journey. The pigeons do face some problems, however, such as getting eaten by predators on route.