Cranes usually build their nests in marshy areas and lay two eggs at a time. Cranes can make sounds that are heard from far away. Cranes dance special dances when they mate, and they include stepping quickly, high leaps, stretching, and bowing. Crane chicks grow very quickly and at two to four months, they develop their flight feathers. Cranes are very vocal. They use several different types of calls. They also communicate with their bodies.