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Name: Jayneel
Status: student
Grade: 6-8
Location: Outside U.S.
Country: India
Date: Fall 2011


Question:
How can eagles fly without flapping their wings?



Replies:
Dear Student, Let us go for some basics first about birds. In order to be a successful dwellers of air environment, birds have special adaptations that include Hollow bones One set of organs where possible special sacs (air bladders) which contain lighter than air gases

All the above things help maintain a required height by the bird.

Coming to your question, eagles and other larger birds first attain a specific height through flapping of their wings. Then they open their wings fully and glide on the air taking help from the modifications mentioned earlier. By filling more gases through their lungs into air bladders they keep themselves at a specific height. It is to remember that they are unable to go further high by gliding alone so they flap their wings in between to do that. I hope you resolves your query.

Waseem S. Abbasi PhD


Eagles, and some other birds, glide. They spread their wings and catch thermal upward drafts of warmer air that rises under their wings. They are able to keep gliding for significant distances, waiting to catch the next updraft.

Vince Calder


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