Halette Bourdon November 29, 2019 Fruit
Abbott Handerson Thayer’s 1909 book Concealing-Coloration in the Animal Kingdom, completed by his son Gerald H. Thayer, argued correctly for the widespread use of crypts among animals, and in particular described and explained countershading for the first time. However, the Thayers spoilt their case by arguing that camouflage was the sole purpose of animal coloration, which led them to claim that even the brilliant pink plumage of the flamingo or the roseate spoonbill was cryptic—against the momentarily pink sky at dawn or dusk. As a result, the book was mocked by critics including Theodore Roosevelt as having ”pushed [the ”doctrine” of concealing coloration] to such a fantastic extreme and to include such wild absurdities as to call for the application of common sense thereto.
When we see leaf-eating insects green, and bark-feeders mottled-grey; the alpine ptarmigan white in winter, the red-grouse the colour of heather, and the black-grouse that of peaty earth, we must believe that these tints are of service to these birds and insects in preserving them from danger. Grouse, if not destroyed at some period of their lives, would increase in countless numbers; they are known to suffer largely from birds of prey; and hawks are guided by eyesight to their prey, so much so, that on parts of the Continent persons are warned not to keep white pigeons, as being the most liable to destruction. Hence I can see no reason to doubt that natural selection might be most effective in giving the proper colour to each kind of grouse, and in keeping that colour, when once acquired, true and constant.
Blue, in all respects is the total opposite of red. While blue is transparent and wet in appearance red is opaque and dry. Psychologically the cold and comforting nature of blue is the polar opposite of the warmth and excitement of red. In contrast to red, blue reduces body temperature, blood pressure and pulse rate. Blue evokes feelings of contentment, spaciousness and comfort due to being the color of the sky and ocean as well. As the shade of blue approaches black with the addition of black it may become depressive and melancholic. Blue is a color that is widely recommended for use in children’s rooms. Especially in nurseries, the use of blue helps the baby’s easy and peaceful transition into sleep. It can also be comfortably used with active and vibrant children due to its calming effect. As is the case with all other colors, you can accessorize your room in red and yellow when you choose to paint your walls in blue.
I’ve colored for as long as I’ve been able to Before adult coloring books I just colored in children’s books or would find or make pictures on my computer But since finding adult books My life has literally been turned around I suffer from severe depression and anxiety Coloring and journalism sometimes are the ONLY way I can get through a day It sometimes has better affects than my actually therapy If I didn’t have my coloring I really don’t know where I would be and that’s the honest truth It’s not always easy for me to open up to others so I’m able to get things out with coloring even friends and family have looked at my pictures and just by the colors they can tell what kind of day I’m having I’m so grateful for Adult Coloring Books!!
While many animals are unable to synthesize carotene pigments to create red and yellow surfaces, the green and blue colors of bird feathers and insect carapaces are usually not produced by pigments at all, but by structural coloration. Structural coloration means the production of color by microscopically-structured surfaces fine enough to interfere with visible light, sometimes in combination with pigments: for example, peacock tail feathers are pigmented brown, but their structure makes them appear blue, turquoise and green. Structural coloration can produce the most brilliant colors, often iridescent. For example, the blue green gloss on the plumage of birds such as ducks, and the purple blue green red colors of many beetles and butterflies are created by structural coloration. Animals use several methods to produce structural color, as described in the table.
Pigments are colored chemicals (such as melanin) in animal tissues. For example, the Arctic fox has a white coat in winter (containing little pigment), and a brown coat in summer (containing more pigment), an example of seasonal camouflage (a polyphenism). Many animals, including mammals, birds, and amphibians, are unable to synthesize most of the pigments that color their fur or feathers, other than the brown or black melanins that give many mammals their earth tones. For example, the bright yellow of an American goldfinch, the startling orange of a juvenile red-spotted newt, the deep red of a cardinal and the pink of a flamingo are all produced by carotenoid pigments synthesized by plants. In the case of the flamingo, the bird eats pink shrimps, which are themselves unable to synthesize carotenoids. The shrimps derive their body color from microscopic red algae, which like most plants are able to create their own pigments, including both carotenoids and (green) chlorophyll. Animals that eat green plants do not become green, however, as chlorophyll does not survive digestion.
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