A Crystal Chalice
Clip: Season 30 Episode 2 | 1m 17s
Male swiftlets use their own building material, gluey saliva, to make their nests. Constructed layer by layer along the cave walls, it can be weeks of painstaking work.
Aired: 11/01/11
The full episode is no longer available for online streaming. Why?
Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.
Buy Now:
Major support for NATURE is provided by the Arnhold Family in memory of Henry and Clarisse Arnhold, Sue and Edgar Wachenheim III, the Kate W. Cassidy Foundation, the Lillian Goldman Charitable Trust, Kathy Chiao and Ken Hao, the Anderson Family Fund, the Filomen M. D’Agostino Foundation, Rosalind P. Walter, the Halmi Family in memory of Robert Halmi, Sr., Sandra Atlas Bass, Doris R. and Robert J. Thomas, the Hite Foundation, Charles Rosenblum, the Arlene and Milton D. Berkman Philanthropic Fund, the Sun Hill Family Foundation, the M. & H. Sommer Foundation, Ron Hull, the Bradley L. Goldberg Family Foundation, by the Corporation for Public Broadcasting, by PBS, and by Viewers Like You.
