Some species and/or populations of '''cranes''' migrate over long distances, while some do not migrate at all. '''Cranes''' are gregarious, forming large flocks where their numbers are sufficient.
The first '''cranes''' were invented by the Ancient Greeks and were powered by men or beasts-of-burden, such as donkeys. These '''cranes''' were used for the construction of tall buildings. Larger '''cranes''' were later developed, employing the use of human treadwheels, permitting the lifting of heavier weights.
