Feather-fringed Bubbles

11/10/2016


Waldog

"The bones of birds are hol- low; their feathers weigh more than the skeleton. Their bodies are full of air sacs; their feathers, also hollow shafted, are sculpted to cap- ture and move air. Birds are essentially feather-fringed bubbles."


- Sy Montgomery





Posted in Facts-Findings

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