Feather structure - PowerPoint PPT Presentation

Class Aves: Feathers

Class Aves: Feathers. 25. BIRDS AND DINOSAURS. http://www.csicop.org/uploads/images/si/ph21.gif. 26. 27. ORIGIN OF FEATHERS: BIRDS. Archaeopteryx. ORIGIN OF FEATHERS: DINOSAURS. Caudipteryx , China, late Jurassic / early Cretaceous. Feathers. 2. WHY?. Why?. 52. Keratin.

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Feathers and Topography

Feathers and Topography. Feathers. Origin: Originally thought to have evolved from scales Now thought to be novel structures Composed of beta-keratins Weigh 2-3 times the skeleton. http://www.themodernapprentice.com/feathers.htm. A group of crows is known as a murder.

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