Man and the Earth
El hombre y la Tierra is a 1974 television series produced by Radio Televisión Española.
71. The Steppe Birds II
0.0May 4, 1979 · 26 min
In April, the mating display of the great bustards takes place. The bearded old males, weighing up to 17 kilograms, acquire striking tones in their plumage and display large, bristly beards.