Modern Marvels

Season 12 Episode 4

Nature's Engineers 2

0
Aired Wednesday 10:00 PM Jan 18, 2005 on The History Channel

Trivia

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  • Trivia

    • It takes hornbill couples an average of 3 to 7 days to seal up the front of their nest cavitites. Depending on the species, females can reamin inside for 3 to 4 months.

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