Feather
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Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds and some non-avian theropod dinosaurs. They are considered the most complex integumentary structures found in vertebrates,</ref> and indeed a premier example of a complex evolutionary novelty.</ref> They are among the characteristics that distinguish the extant Aves from other living groups. Feathers have also been noticed in those Theropoda which have been termed feathered dinosaurs. Although feathers cover most parts of the body of birds, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, waterproofing and coloration that helps in communication and protection.
| Electronic Code of Federal Regulations (e-CFR), Ti... Electronic Code of Federal Regulations (e-CFR), Title 50: Wildlife and Fisheries PART 22—EAGLE PERMITS ecfr.gpoaccess.gov/.../50cfr22_main_02.tpl - Web |
| U.S. v. Thirty Eight Golden Eagles (1986) U.S. v. Thirty Eight Golden Eagles (1986) www.animallaw.info/cases/caus649fsupp269.htm - Web |
| Mechanical structure of feathers Mechanical structure of feathers www.rdg.ac.uk/biomim/personal/richard/keratin.htm - Web |
Gallery for «Feather»
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| Documentary on the evolution of feathers Documentary on the evolution of feathers www.educatedearth.net/video.php?id=4982 - Web |
| Lecture notes on the avian integument Lecture notes on the avian integument faculty.weber.edu/jcavitt/Lecture4.pdf - Web |
| U.S. National Fish and Wildlife Forensics Laborato... U.S. National Fish and Wildlife Forensics Laboratory's Feather Atlas www.lab.fws.gov/featheratlas - Web |
| Federn.org Federn.org www.federn.org/index_en.html - Web |
