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Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds. They are the outstanding characteristic that distinguishes the Class Aves from all other living groups. Other Theropoda also had feathers (see Feathered dinosaurs).
Characteristics
Feathers are among the most complex structural organs found in vertebrates: integumentary appendages, formed by controlled proliferation of cells in the epidermis, or outer skin layer, that produce keratin proteins. The β-keratins in feathers, beaks and claws — and the claws, scales and shells of reptiles — are composed of protein strands hydrogen-bonded into β-pleated sheats, which are then further twisted and crosslinked by disulfide bridges into structures even tougher than the α-keratins of mammalian hair, horns and hoof.
Feathers insulate birds from water and cold temperatures. Individual feathers in the wings and tail play important roles in controlling flight. These have their own identity and are not just randomly distributed. Some species have a crest of feathers on their heads. Although feathers are light, a bird's plumage weighs two or three times more than its skeleton, since many bones are hollow and contain air sacs. Colour patterns serve as camouflage against predators for birds in their habitats, and by predators looking for a meal. As with fish, the top and bottom colors may be different to provide camouflage during flight. Striking differences in feather patterns and colours are part of the sexual dimorphism of many bird species and are particularly important in selection of mating pairs. The remarkable colors and feather sizes of some species have never been fully explained.
More on [ Feather ]
Register your 4â5yr young artist for anatomy art classes this winter.Learn to draw animals, people, feathers & fur http://ow.ly/OnGK #yyc
cityofcalgary (City of Calgary) Tue, 05 Jan 2010 15:48:00 -0000
Register your 4–5yr young artist for anatomy art classes this winter.Learn to draw animals, people, feathers & fur http://ow.ly/OnGK #yyc
@Jennorocks Good luck dude. I used this site for feathers - http://bit.ly/17MlfA and for glyphs - http://bit.ly/8J5hSy
amardilo (Adeel Quadri) Tue, 05 Jan 2010 15:44:14 -0000
@Jennorocks Good luck dude. I used this site for feathers - http://bit.ly/17MlfA and for glyphs - http://bit.ly/8J5hSy
@joesorich I don't know about that. I'm collecting feathers and such!
Gi_nar (Gina Ruggirello) Tue, 05 Jan 2010 15:41:39 -0000
@joesorich I don't know about that. I'm collecting feathers and such!
@DarthAlbertIII Mmmmm I think I won't have a choice ;) Thanks! Found out that you get that last weap. when you have 50 feathers ;)
airdom (Dominic) Tue, 05 Jan 2010 15:35:38 -0000
@DarthAlbertIII Mmmmm I think I won't have a choice ;) Thanks! Found out that you get that last weap. when you have 50 feathers ;)
@airdom Maps for all the feathers can be found here: http://tinyurl.com/aciifeather
DarthAlbertIII (Scott Cochrane) Tue, 05 Jan 2010 15:32:03 -0000
@airdom Maps for all the feathers can be found here: http://tinyurl.com/aciifeather
@DarthAlbertIII Yeah man great game! :) i dunno what do do now besides getting feathers lol.too hard to find!
airdom (Dominic) Tue, 05 Jan 2010 15:26:03 -0000
@DarthAlbertIII Yeah man great game! :) i dunno what do do now besides getting feathers lol.too hard to find!
Lamplight Feathers - Sells decorative array including peacock, pheasant, ostrich, guinea, macaw, marabou, and rooster.
Meta Description: [ Feathers from Lamplight Feather: peacock feathers, ostrich plumes, pheasant feathers, coque, feather boas, feather fans, feather trim, artificial birds, costume and millinery supplies ]
Plumes and Feathers - Specialty is peacock feathers. Others include turkey, ostrich, goose, coque, guinea, pheasants, and duck. Also sells porcupine quills and human hair.
Meta Description: [ Aashlok Inc. has been a respected name in the fancy feathers industry for the last 35 Years. We offer a complete range of feathers and feather products in peacock, ostrich, turkey, coque, pheasant, goose, milliner and guinea feathers, boas, fans, wreaths, fringes and trims. ]
Rainbow Feathers - Sells variety of goose, chicken, duck, turkey, ostrich, and peacock.
Meta Description: [ Fancy dyed feathers for costumes,flower
arrangments, boas,fans,archery,fashion. ]
The Feather Place - Retails rooster, goose, pigeon, pheasant, turkey and ostrich varieties. Also sells costumes, masks, wings and head pieces.
Meta Description: [ Welcome to The Feather Place Online! Our company has been serving the world since 1872. We distribute one of
nature's most beautiful, enduring and durable works of art--the feather. Our industry and craft have been around since
before the ancient Egyptians and our product is seen throughout the ... ]
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