Free Tweety Bird Wallpaper Biography
Birds are, hands down, the most colorful terrestrial vertebrates -- only insects and coral reef fishes rival them among animals. Birds, like butterflies and moths, have two basic sources of color. The more common is pigments, which are chemical compounds located in the feathers or skin. Pigments absorb some wavelengths of light and reflect others; it is the reflected light that reaches our eyes. The color we perceive is a function of the wavelength of the light stimulating the receptors of our retinas. In the visual part of the electromagnetic spectrum, we see the shortest wavelengths as "violet" and the longest as "red." Thus a cardinal has pigment in its feathers that absorbs all the wavelengths except the ones that, when they enter our visual system, register as red. When no light is reflected we see black; when all wavelengths are reflected we see white.
Blue and iridescent colors in birds are never produced by pigments, however. They are "structural colors." The blues are produced by minute particles in the feather that are smaller in diameter than the wavelength of red light
Birds are, hands down, the most colorful terrestrial vertebrates -- only insects and coral reef fishes rival them among animals. Birds, like butterflies and moths, have two basic sources of color. The more common is pigments, which are chemical compounds located in the feathers or skin. Pigments absorb some wavelengths of light and reflect others; it is the reflected light that reaches our eyes. The color we perceive is a function of the wavelength of the light stimulating the receptors of our retinas. In the visual part of the electromagnetic spectrum, we see the shortest wavelengths as "violet" and the longest as "red." Thus a cardinal has pigment in its feathers that absorbs all the wavelengths except the ones that, when they enter our visual system, register as red. When no light is reflected we see black; when all wavelengths are reflected we see white.
Blue and iridescent colors in birds are never produced by pigments, however. They are "structural colors." The blues are produced by minute particles in the feather that are smaller in diameter than the wavelength of red light
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
Free Tweety Bird Wallpaper
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