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Erythrism or erythrochroism refers to an unusual reddish pigmentation of an animal's hair, skin, feathers, or eggshells.
Causes of erythrism include:
* Genetic mutations which cause an absence of a normal pigment and/or excessive production of others
* Diet, as in bees feeding on "bright red corn syrup" used in maraschino cherry manufacturing.
Erythrism in katydids has been occasionally observed. The coloring might be a camouflage that helps some members of the species survive on red plants. There is also consensus that the erythristic mutation is actually a dominant trait among katydid species, albeit a disadvantageous one, due to the overwhelmingly green coloration of most foliage. Hence, most pink or otherwise vividly colored katydids do not survive to adulthood, and this observation explains their rarity. Erythrism in leopards is rare, but one study reported that two of twenty-eight leopards seen in
File:Pink_katydid_Ontario.jpg
File:Pink-orange_katydid,_Florida.jpg
File:Pink katydid New York.jpg
File:Pink Grasshopper with Erythrism found in Kelleys Island, Ohio.jpg
The Mystery of the Red Bees of Red Hook
''The New York Times'', November 30, 2010
Rare Pink Katydid Discovered in Northern Illinois
''Chicago Tribune'', August 10, 2011
August 28, 2009
Erythrism: Grasshopper in New Zealand
Rod Morris, 2010
Pink Animal Amazingness
{{Webarchive, url=https://web.archive.org/web/20081223144302/http://www.lemondrop.com/2008/12/18/pink-animal-amazingness/ , date=2008-12-23 , Paula Kashtan, lemondrop.com, December 18, 2008 Disturbances of pigmentation Genetic disorders with no OMIM Dermatologic terminology
Erythrism or erythrochroism refers to an unusual reddish pigmentation of an animal's hair, skin, feathers, or eggshells.
Causes of erythrism include:
* Genetic mutations which cause an absence of a normal pigment and/or excessive production of others
* Diet, as in bees feeding on "bright red corn syrup" used in maraschino cherry manufacturing.
Erythrism in katydids has been occasionally observed. The coloring might be a camouflage that helps some members of the species survive on red plants. There is also consensus that the erythristic mutation is actually a dominant trait among katydid species, albeit a disadvantageous one, due to the overwhelmingly green coloration of most foliage. Hence, most pink or otherwise vividly colored katydids do not survive to adulthood, and this observation explains their rarity. Erythrism in leopards is rare, but one study reported that two of twenty-eight leopards seen in camera trap
A camera trap is a camera that is automatically triggered by a change in some activity in its vicinity, like presence of an animal or a human being. It is typically equipped with a motion sensor – usually a passive infrared (PIR) senso ...
s in a South African nature reserve were erythristic, and the authors found records of five other "strawberry" leopards from the region.
Gallery
See also
*Albinism
Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin and pink or blue eyes. Individuals with the condition are referred to as albino.
Varied use and interpretation of the term ...
* Amelanism
* Dyschromia
Dyschromia refers to an alteration of the color of the skin or nails.
"Hyperchromia" can refer to hyperpigmentation, and "hypochromia" can refer to hypopigmentation.
"Dyschromatoses" involve both hyperpigmented and hypopigmented macules.
__TOC__ ...
* Heterochromia iridum
* Leucism
Leucism () is a wide variety of conditions that result in the partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. It is occasionally spelled ...
* Melanism
The term melanism refers to black pigment and is derived from the gr, μελανός. Melanism is the increased development of the dark-colored pigment melanin in the skin or hair.
Pseudomelanism, also called abundism, is another variant of ...
* Piebaldism
* Red hair
* Vitiligo
Vitiligo is a disorder that causes the skin to lose its color. Specific causes are unknown but studies suggest a link to immune system changes.
Signs and symptoms
The only sign of vitiligo is the presence of pale patchy areas of depigmen ...
* Xanthochromism
References
External links
The Mystery of the Red Bees of Red Hook
''The New York Times'', November 30, 2010
Rare Pink Katydid Discovered in Northern Illinois
''Chicago Tribune'', August 10, 2011
August 28, 2009
Erythrism: Grasshopper in New Zealand
Rod Morris, 2010
Pink Animal Amazingness
{{Webarchive, url=https://web.archive.org/web/20081223144302/http://www.lemondrop.com/2008/12/18/pink-animal-amazingness/ , date=2008-12-23 , Paula Kashtan, lemondrop.com, December 18, 2008 Disturbances of pigmentation Genetic disorders with no OMIM Dermatologic terminology