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Post by OldGreenGrolar on Jan 6, 2023 17:31:11 GMT -5
Bluebirds main enemies are house sparrows.
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Post by OldGreenGrolar on Jan 28, 2023 6:47:03 GMT -5
When is a blue bird not blue?Mountain Bluebird, Cabin Lake Viewing Blinds, Deschutes National Forest, Near Fort Rock, Oregon (Photo by Elaine R. Wilson) When is a blue bird not blue? The answer to this question is always. There actually is no such thing as a blue bird. To find out why, Smithsonian asked Scott Sillett, a wildlife biologist at the Smithsonian Migratory Bird Center. “Red and yellow feathers get their color from actual pigments, called carotenoids, that are in the foods birds eat,” Sillett explains. “Blue is different―no bird species can make blue from pigments. The color blue that we see on a bird is created by the way light waves interact with the feathers and their arrangement of protein molecules, called keratin. In other words, blue is a structural color. Different keratin structures reflect light in subtly different ways to produce different shades of what our eyes perceive as the color blue. A blue feather under ultraviolet light might look uniformly gray to human eyes.” www.si.edu/stories/when-blue-bird-not-blue
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Post by OldGreenGrolar on Jan 28, 2023 6:47:38 GMT -5
Blue birds are not really blue. Their feathers just reflect blue light.
Offtopic: my fictional blue ice bear and blue birds have blue pigments.
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Post by brobear on Jan 28, 2023 6:51:56 GMT -5
Question: When is a blue bird not blue? Answer: When he is a happy bird. (couldn't resist)
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Post by brobear on Feb 12, 2023 6:32:56 GMT -5
Fossils Reveal Two New Species of Giant Penguins www.sci.news/paleontology/kumimanu-fordycei-petradyptes-stonehousei-11641.html One of the two new species, Kumimanu fordycei, weighed up to 160 kg (353 lbs) and may have been the largest penguin ever to have lived, according to Bruce Museum paleontologist Daniel Ksepka and his colleagues from New Zealand, the United Kingdom and the United States.
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