The human eye can discern electromagnetic radiation in a rather narrow band of wavelengths of about 390 to 700 nanometers, a frequency of 430-770 THz. The visible colors of the spectrum may be arranged in the order of their frequency, from low to high (wavelengths from long to short).
Thanks to a profusion of retinal cones, humans can see colors better than most other mammals. However, birds generally see a wider range of colors, snakes are able to detect infrared, and spiders, bees and many other insects (and rats) are sensitive to ultraviolet light. Many flowers attract pollinators with ultraviolet hues.
As a child I learned to recite the colors of the rainbow, from top to bottom (long to short wave) by reciting the mnemonic "Roy G Biv."
"Another traditional mnemonic device has been to turn the initial letters of seven spectral colors into a sentence. In Britain the most common is "Richard Of York Gave Battle In Vain." The mnemonic is said to refer to the defeat and death of Richard, Duke of York at the Battle of Wakefield. To avoid reference to this defeat, people from Yorkshire developed the alternative "Rowntrees Of York Gave Best In Value." Alternatively, the biblically inspired "Read Out Your Good Book In Verse," or the more anarchic "Rinse Out Your Granny's Boots In Vinegar," may be used." (Wikipedia)
Our neighbor Estelle's home is at the end of one:
ROY G BIV Birds--
Red: Scarlet Tanager
Orange: Baltimore Oriole
Yellow: American Goldfinch
Green: Painted Bunting female
Blue: Mountain Bluebird
Indigo: Indigo Bunting
Violet: Common Grackle
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Linking to Misty's CAMERA CRITTERS,
Linking to Eileen's SATURDAY'S CRITTERS,
Linking to FENCES AROUND THE WORLD by Gosia
Linking to WEEKEND REFLECTIONS by James
Linking to BirdD'Pot by Anni
Linking to Wild Bird Wednesday by Stewart
Linking to Wordless Wednesday (on Tuesday) by NC Sue
Linking to ALL SEASONS by Jesh
Please visit the links to all these memes to see some excellent photos on display