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More of Saroj Swain's Photos
Photo Info
Enter "A Window Of Opportunity"!
Q: Full frame and cropped sensors
A: Do you know?
Photo license: © All rights reserved
Darwin wrote:
"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."
4 responses
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Donald Garrett gave props (8 Oct 2012):
Intriguing creature!
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ROCIO GUILLEN gave props (8 Oct 2012):
Marvellous green!
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Michele Wambaugh said (9 Oct 2012):
Wonderful!
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John Linton gave props (4 Mar 2013):
JPG is lucky to have this entry in their Theme Park!
