Are Lizards colorblind?
399230
Not all lizards anyway.\n\nThe nocturnal helmeted gecko has become the first vertebrate known to see colours in the dark\nTHE nocturnal helmeted gecko has become the first vertebrate known to see colours in the dark. \n\nMost creatures, including humans, have eyes that contain two types of light-sensitive cells. In daylight, animals rely mainly on colour-sensing cones that distinguish between light of different wavelengths. At night, when photons are scarce, they rely exclusively on more sensitive rod cells, which are colour-blind. \n\nThe only exception to this rule, and the only animal known to see colours at night, was thought to be the elephant hawkmoth (Deilephila elpenor). It has adaptations, which include different facets of its compound eye, to increase the light captured by its cone cells in the dark (New Scientist, 2 November 2002, p 23).
535808
since lizards are ectotherms i.e. cannot control their temperature via a special biological mechanism they must rely on behavioural temperature regulation.\nLizards bask in the sun when their body temperature is too low and seek shade when it is to high. Whilst in the sun all reptiles must be extra cautious since their temperature increases in a number of ways: apart from the obvious amount of radiation from the sun giving them heat directly, this has another effect as well, the increased temperature causes the enzymes that control their metabolism to work more efficiently metabolising faster and generating more heat from chemical reactions.\nReptiles generally suffer from generating heat faster than they can get rid of it so they must constantly change surroundings
566341
Humans have three types of color receptors (light-sensitive cells) in the retina.\n\nDogs have only two.  So dogs are not (as some people say) completely color blind.  They can distinguish between blues and yellows ... but not between reds and greens.\n\nThe technical terms are that humans are 'trichromatic', and dogs are 'dichromatic.'
871649
That is a very interesting question.\nno . . . . but there is one exception\nIn a camera flash, the light is reaching through the pigmentation\nto the retina, the light-sensitive membrane covering the back wall of the eyeball, which is the color red.\nthe only organisms that have eyes visibly red are ones that are albino\nalbino organisms have less melon(color) in there skin, hair, and eyes.\nresulting in the clear vision to their retina, which causes their eyes to be the color red.\n(i.e. white mice that have red eyes)
956479
DESCRIPTION: \n\nThis unusual mid-sized stocky agamid lizard has prominent spines along its sides and a large, essentially triangle-shaped head. Forming a sort of shield around the snout is a spiney jaw pouch which, when swollen, looks like a beard and makes any predator think twice before attacking. This wide-ranging species shows considerable geographic variation; its basic color varies from shades of brown, gray, and reddish-brown to bright orange. The ventral surface ranges from pale to dark gray, with white elongated spots edged with black. Mature males have dark "beards" which become black during courtship and breeding. Adults can grow as large as ten inches in body length or two feet in total length, including the tail. Males are larger than females. \n\nII. GEOGRAPHICAL RANGE AND HABITAT: \n\nThese lizards are native to Central Australia. They prefer semi-arid to arid woodland habitats. Time is spent both on the ground and in trees. They may be found perched on bush branches and even on fence posts. \n\nIII. DIET:\n\nBearded dragons are omnivorous and consume many types of insects, small vertebrates, and vegetation including fruits and flowers. \n\nIV. LIFE CYCLE/SOCIAL STRUCTURE:\n\nSexual maturity is reached at one to two years of age. Mature females typically lay clutches of eleven to sixteen oblong leathery eggs in early summer. The eggs are laid in nests dug in sandy soil and the unattended young hatch 3 months later. \n\nV. SPECIAL ADAPTATIONS:\n\nA bulky body and the habit of basking allows them to store heat, making it possible to operate at lower temperatures than other lizards. They can also survive higher temperatures for several hours, since they can regulate body temperature by evaporation. \n\nVI. INTERPRETIVE INFORMATION:\n\nWhen intimidated, they flatten their bodies and stand erect with mouth gaping. The light-colored mouth lining, spines bordering the lower jaw and puffed-out blackish beard give a formidable appearance. This defensive display has earned these lizards the common name of "bearded dragon". \nAggressiveness to other members of the group is shown through "body language". The tip of the tail is slightly curved at the end and the head is bobbed rapidly. Submission is signaled by rotating the arms in a full circular motion, which looks a bit like waving. Ritualistic sparring matches take place in which both animals are in flat postures, beards and tails up and outward; they circle each other, biting at one another's tail, but usually no damage is done. \n\nTheir ability to change shades of color, from light to dark, helps them to regulate body temperature. Color changes can also depend on emotional state, and may also be used for concealment. When injured, sick, or dying the back becomes black and the legs pale yellow. \n\nAustralian desert lizards often make their escape by rising on their hind legs and running bipedally. They cannot run as fast as when using four feet, but perhaps this behavior aids in temperature control. They lift their bodies from the hot ground to lose the heat they generate in running. This reduces the amount of heat they take in from the ground and increases the cooling airflow over their bodies.
105466
Colorblindness is a sex-linked trait.  It is carried on the X chromosome and is recessive.  Females have two X chromosomes, which means that even if they inherit a recessive allele for colorblindness it will usually be "covered up" or masked by a dominant allele on the other X chromosome.  \nMales on the other hand only have one X chromosome so if they inherit a recessive allele for colorblindness, they will be colorblind.\nHope this is helpful :-)
623390
Humans have a poor ability to distinguish colors in the blue portion of the visual specturm where indigo is found.
208190
I'm colour blind actually....I have a very hard time with shades and red-greens.  I see colour differently than you do.  Or don't see as the case may be.
78687
All the boys will have colorblindness. it depends strongly on the parental generation though.\nSince the father gives the progeny an X OR a Y chromosome (since boys are XY), to dictate the sex of the progeny, and the mother can only give an X chromosome (since girls are XX), therefore if the gene for colorblindness was on the Y chromosome, only the boys would have it because girls cannot have a Y chromosome. :)
674386
They are really altering thier color.  Cuttlefish, for example, have specialized pigment cells (chromatophores) that contain different colors. These cells compress or expand to increase or decrease the balance of the color in that area.  The overall effect is much like the pixels of your computer screen, different color concentrations and mixtures changing what you see.
1160277
Theoretically, the answer is no; all people do not see the same shade and intensity of color.  Color vision occurs as a result of specialized photo-receptors in our eye.  The number of these receptors can differ from person to person, and as a result, some people may be more sensitive to certain colors than others.  A simple way to test this would be to take freshly isolated retinas from various individuals (ie: laboratory animals) such that the photoreceptors (rods and cones) are still intact and expose the retinas to lights of different wavelengths (ie: colors) and intensities while simultaneously recording the neuronal output generated in response to the lights.  I haven't done such an experiment myself, but it is very logical to assume that no two individuals would respond the same way to the lights, since perception of the light stimulus depends on the frequency and duration of the activation of the receptor neuron as well as the number of receptor neurons activated and their distribution in the retina.
1166384
It may be a Sagebush lizard or a Western fence lizard. Would have helped if I know which state you were from.
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yes, but the chances are low. The defective gene for colorblindness is on the X chromosome. A man has one copy of the X chromosome, so if he has that copy he'll be colorblind\n\nHowever a girl has 2 copies, and as long as they have one functioning copy, they won't be.\nHowever, if your father is colorblind, and your mother is a carrier for colorblindness, your chances as a girl for being colorblind is 50%
710589
being color blind does not mean you see everything in black and white.  Most people with colorblindness have difficulty distinguishing between similar colors, ie.  blue and navy blue........blue and purple....orange and yellow..and so forth.  Rest assured, colorblind people can distinguish between the varying traffic lights, and they also get the full enjoyment that we get, when watching color television:)
1118676
lizards = frogs\nfrogs = lizards
64730
That really is a fun and interesting question!!!\n\nOur cones are not necessarily identical, which means that out perceptible gamut will not map identically on the xy plane. (Click on the link from Discover Labs listed below for pictorial examples of these differences, for example in color blindness) \n\nHowever the difference for most of us is so insignificant that it doesn't matter. \n\nThat is what professionals like photographers, artists and cinematographers, etc. base their success in their professions on. Also remember that colors are not arbitrary but are determined by their wavelengths. There may be some other issues on a quantum level, More...\n\nYou'll find some fun, interesting and easy to understand theory in addition to great explanatory  illustrations here at this link:\n\nhttp://www.discover.uottawa.ca/~aelsawah/csi4133/Lab02.htm
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Try this - you'll be surprised how many people have a degree of colour-blindness without realising\n\nhttp://128.121.139.89/SWF/ColorBlind21.swf