Jungle Sounds From Dawn to Dusk
In Jungle Sounds From Dawn to Dusk, narrator Sir David Attenborough teaches about Siamang gibbon calls. The calls can be heard over a mile away. In the early morning the forest’s chorus is particularly rich because cool air enables sound to travel faster. This video is excerpted from BBC's Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.
Lesson Express
Q: What is the purpose of the Siamang gibbons’ calls?
A: The calls are the way they establish their territory in fruit trees and warn other monkeys to stay away.
Q: Why is it louder in the jungle in the early morning?
A: The sounds travel further in the cooler morning air, whereas the hotter afternoon air muffles the sounds.
Q: How do insects work in harmony?
A: The insects time their calls to fall in between the calls of others; some even maintain schedules.
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