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22 Cards in this Set
- Front
- Back
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Barbules that have hooklets |
Distal barbules |
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Primary structural protein of birds and reptiles |
Beta keratin |
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Beta Keratin structure 2nd |
Pleated sheets instead of alpha helices |
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Apterya |
Areas where no feathers are growing |
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One of the first thing chick's will do before thy start to pant is... |
Stretch their necks and lift their feathers to expose the apteryae for thermoregulation |
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What determines an objects color |
Hue-chroma is the peak wavelength of reflection Saturation involves other wavelengths Bintensity due to brightness of a light or color |
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Implication of having tetrahedral element to vision VS planar |
Not simply that birds can see what we see plus uv, but because of 4 cones there are combinations of color, including uv that birds see and we do not |
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White is when there is... |
Relfectsnce of the full spectrum of wavelengths visible in sunlight |
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Black is when little to no... |
Light is reflected |
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Specifics properties with which light interacts with object it interacts with.. |
Refkected Absirbed Transmitted Emitted |
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Subtractive color |
Pigments that absorb and interact with light at atomic level to change or remove light Pigments key. Absorb and interact w light. Subtracts or removes light |
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Additive coloration mechanism |
Mechanisms influence by structural arrangements of material Air and keratin and also melanin at work but primarily air and keratin |
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Coloration of the Venezuelan Troupial vs the Mountain bluebird |
Troupial color is due to pigments which absorb certain wavelengths and reflect others. Independent of feather structure Bluebird color created by scattering only blue wavelengths of incoming light with bubbles of air and keratin. Entirely structural |
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Coherent scattering colors |
Structural blues and iridescence |
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Patterns are caused by... |
Melanin at a cellular level Can form stripes and eye spots thru cell by cell control |
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Pigments that degrade in uv light |
Poryphins though they also fluoresce. |
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How common is uv plummage refkectance |
142 families |
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Structural colors are produced by coherent scattering except for... |
White which is produced by incoherent scattering |
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What gives blueish hue of iceburgs |
Incoherent scattering |
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A quasi ordered pattern of air bubbles in keratin matrices will produce this. May also include tiny pigments in barbs to scatter short wavelengths |
Structural blue with uv frequencies Color same with angle of light Ie Eurasian Jay feather |
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Hue shifts depending on angle |
Iridescence |
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Iridescence caused by... |
Small platelets on barbules causing color change with angle of light |
