Life on Earth
Lords of the Air (1x8)
Ausstrahlung: Mär 06, 1979
We examine the uses and advantages of birds' unique possession - the feather. Feathers are insulators; they provide the surface of the most perfect aerofoils known - bird's wings; and they play a central role in courtship
- Premiere: Jan 1979
- Episoden: 13
- Anhänger: 16