Respiratory System of Birds

[Debra]

I thought this was an interesting read and thought I'd share:

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[Honesty]

A very interesting article Deb. :thanks4sharingthumb

[coltfire]

:thanks4sharingthumb that was a very interesting read. and very informative

[jules]

thankyou debra, it was interesting. birds have very complex respiratory systems don't they? :)

[Blancaej]

Thanks for sharing Debra!