Are all animals color blind?
92058
like, one thing i know is, deer, when you go hunting you could wear neon pink or bright orange camo and they still would think you are wear the same coulor as forest camo. now, turkeys, you haveta wear forest camo, cause they can see in color. Hope this helped!
1068505
No.\n\nSee, the thing is that most animals is that have evolved pigments to stop light penetrating their cells.  A man could have all the grenpigment he wanted and it won't do anything because the interior of the cells will be permanently in the dark.\n\nWith transparent animals like jellyfish or glass fish or similar you probably could achieve some level of autotrophic activity.\n\nIn the case of a highly active animal like a man the payoff wouldn't be worth the cost. Chlorplasts require energy to build and maintain and active animals can't afford to laze around int he sun all day. That's why the ancestors of animals abandoned their chlorophyll in the first place (did you know that all animals are descended from photosyntheic organisms?)\n\nSorry, but there are just too many hurdles to having a photosynthetic man.
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:)
911594
Animals do not have chlorophyl in their cells....;
1163310
Yes and yes. They are responding to the motion of the cape, not the color.\nTests for this sort of thing are pretty cool and pretty cruel. They train a bull to get food from a square red box. The bull associates food and the square red box. Then they put two boxes out there - a square red box with food, and a square green box with a nasty surprise (frequently noise or a squirt of water that the bull hates) - and see if the bull can find the food more often than random chance would account for.\nAnd they can't.
902655
I believe so. Their eyes are poor and good basically for detecting motion. It is not correct to say they are blind, though.
847239
No.\n\nFish can see in five colours. We can only see in three (although some women can see in four). Humans have a blind spot caused by the wiring of their retinas; octopuses do not. The resolution of human vision is not as good as that of hawks. A hawk's vision is about 20/5; they can see an object from about four times the distance of a human with 20/20 vision.\n\nAnd that's just the eyes.\n\nOur skin is not as thick and tough as a rhinoceros', so provides us no protection. It has no fur to keep us warm. We are not the fastest organisms. We are not the only organisms that know how to use tools (see Caledonian crows, some apes and beavers).\n\nAs far as evolution is concerned, if it survives, it's superior. If it doesn't survive, it's inferior. By that standard, all animals are superior, and by inference, all plants.
1036252
Why is there no mammal with green fur? Green is a good camouflage color, and nonmammals (for example, frogs, snakes, and birds) do come in green. Why not mammals?\n\nThis is similar to the first question I asked on yahoo! answers, and this was the link from the best answer to that question. It was exactly what I was looking for, hope you think so too.\n\n\nI know from my general zoology classes that mammals can make only two kinds of pigment: melanin (black or brown pigment) and the reddish-yellow pigment that red-haired people have. So my first idea for a simple explanation of the nonexistence of green mammals was to say that mammals just can't make green pigment for some reason. This is of course not a good evolutionary explanation, but at least it superficially answers the question.\n\nAs I started researching this a bit more, I was astounded to discover that frogs, birds, and others in the tetrapod, or four-legged, world can't make green pigment, either! Or blue, for that matter. It turns out that all color variation that we see in tetrapod animals is the result of different combinations of patterns of deposition and refraction of the same two types of pigments: black and yellow-red. A chameleon's color changes because of rapid shape changes in refractory cells in its skin, not by rapid production or release of an actual pigment. Frogs are green because of the pattern of refraction of blue light by special cells in their skin, which blends with their yellow pigment.\n\nThe colors of bird feathers are also generated by light refraction but by a different mechanism. The surface of feathers has microscopic ridges that form ordered tracks, much like the surface of a CD. The spacing of the ridges and the size and orientation of the pigment granules they contain determine the feathers' brilliant greens and blues (see links in reference 2). Tiny air pockets in feathers can add to color variation in birds. Light refraction is also responsible for the color of the human iris, which can range into deep blue or green hues. Another example is the sky-blue nose of the mandrill. For an exploration of the ways animals make different colors, see reference 1.\n\nAs you can see, the question is really why mammals don't have the ability to generate a variety of colors in their fur. This is a difficult question, and until we master time travel—to be able to trace back the evolution of mammals—we won't know the answer with certainty. But it's interesting to speculate, so here are some possible explanations.\n\n1. I think that the most important difference is in the lifestyle of mammals. Being warm-blooded animals, they are constantly in search of food and are moving a lot. Even if an animal has the best camouflage, as soon as it starts moving, it is more easily detected. In contrast, many amphibians and reptiles can spend a long time being motionless, and here looking the same as a leaf nearby helps more. I believe that during evolution, mammals have "invested" more into working out active escape mechanisms (for example, running away and hiding in burrows) rather than into developing passive camouflage techniques.\n\n2. Scientists believe that the first mammals were relatively small, ratlike creatures that ate insects. Their habitats were probably different in terms of background color patterns compared with the habitats of amphibians and reptiles. Mammals, of course, originated on land, while amphibians never leave the source of water. More green is around amphibians, and therefore we find more green amphibians.\n\nIn contrast to their early ancestors, many mammals are now large, and for them, a factor of size comes into play in determining coloration. As we know from classical statues, it's difficult to cover a whole mammal with a fig leaf (but it is quite possible for a frog). A solid-green mammal would in fact stand out in real habitats rather than be hidden. For a large animal, being dappled h
477694
It's not true.\n\nMost animals don't have much in the way of eyes at all, of course, but you're probably more interested in vertebrates.\n\nMost vertebrates have very good color vision.  The primary exception is mammals.  (Snakes are also an exception, for similar reasons.)  We got a bit shafted because our ancestors in the Mesozoic (age of dinosaurs) were all nocturnal.  Nocturnal animals don't really need color vision (black & white works better in the dark), so our ancestors mostly lost it.  Then the dinosaurs died off and mammals retook the day and have been putting color vision back together ever since.\n\nMammalian color vision is, thus, not quite as good as that of the rest of the vertebrates.  Cats and dogs do have color vision, but not as good as ours, and ours isn't as good as that of most reptiles.
12543
From a physics/physiology standpoint, we have color because light waves come in different lengths and our eyes perceive a limited band of thoses lengths with differing responses by light sensors in the eyes.\n\nFrom an evolutionary standpoint, color vision (as opposed to black and white), gives us a great deal more information to process our environment.  For instance, a brightly colored bird might hardly be visible to an animal with only black and white vision, but we see it easily, even against a confusing background.  Color can help us see the difference between animal (browns) and plants (greens), healthy(a child covered in mud) and unhealthy (a child covered in blood), and other differences that are more easily recognized due to the greater information richness available.
967941
What colorblindness is:\nColor blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition. Red/Green color blindness is by far the most common form, about 99%, and causes problems in distinguishing reds and greens. Another color deficiency Blue/Yellow also exists, but is rare and there is no commonly available test for it. \nDepending on just which figures you believe, color blindness seems to occur in about 8% - 12% of males of European origin and about one-half of 1% of females. I did not find any figures for frequency in other races. Total color blindness (seeing in only shades of gray) is extremely rare. \nThere is no treatment for color blindness, nor is it usually the cause of any significant disability. However, it can be very frustrating for individuals affected by it. Those who are not color blind seem to have the misconception that color blindness means that a color blind person sees only in black and white or shades of gray. While this sort of condition is possible, it is extremely rare. Being color blind does keep one from performing certain jobs and makes others difficult. \n\nLife's minor frustrations (and occasional dangers) for the color blind:\nWeather forecasts - especially the Weather Channel - where certain colors just can not be distinguished on their weather maps. Also, maps in general because of the color coding on the legends. \nBi-color and tri-color LEDs (Light Emitting Diodes): Is that glowing indicator light red, yellow, or green? \nTraffic lights, and worst of all, Caution lights: Color blind people always know the position of the colors on the traffic light - in most states, Red on top, Yellow in the center, Green (or is that blue?) on the bottom. It isn't good when we go to a city or state where they put traffic lights horizontal - it takes a couple of days to get used to that one! But caution lights present an entirely different problem. In this situation there is only one light; no top or bottom, no right or left, just one light that is either red or yellow - but which is it? \nGetting in the sun with your girlfriend: So, you're out in the boat or on the beach with your girlfriend and soaking up the rays. But I can't tell until far too late if I'm getting red - or if she is. If I can tell it's red, by that time it's fire engine red and a painful sunburn is already present. \nColor observation by others: "Look at those lovely pink flowers on that shrub". My reply, looking at a greenish shrub "What flowers?" \nPurchasing clothing: I've got some really neat colors of clothes. Not everyone appreciates them like I do though; they seem to think the colors are strange. I just don't know why! \nKids and crayons: Color vision deficiencies bother affected children from the earliest years. At school, coloring can become a difficulty when one has to take the blue crayon -and not the pink one- to color the ocean. \nTest strips for hard water, pH, swimming pools, etc.: A color blind person is generally unable to : \ninterpret some chemical reactions \nsee that litmus paper turns red by acid \nidentify a material by the color of its flame such as lead blue or potassium purple \ninterpret the chemical testing kits for swimming pool water, test strips for hard water, soil or water pH tests - all of which rely on subtle color differences and a band of similar colors to compare against. \nCooking and foods: \nWhen cooking, red deficient individuals cannot tell whether their piece of meat is raw or well done. Many can not tell the difference between green and ripe tomatoes or between ketchup and chocolate syrup. \nSome food can even look definitely disgusting to color deficient individuals. For example, people with a green deficiency cannot possibly eat spinach which to them just look like cow pat. They can however distinguish some citrus fruits. Oranges seem to be of
1118596
Yep, most animals have vocalisations that differ between males and females.\n\nThat may be harder to pick for animals that we have bred to be highly variable like dogs, but even there within a specific breed it is usually possible to differentiate the males and females by their bark.\n\nBut certainly it is easy to differentiate roosters from hens, bulls from cows or stallions from mares based upon just the sound alone.\n\nBy the time we get to animals like frogs or cicadas it becomes extremely easy to do because only the males make any sound. The females are mute.
41312
Every animal has a language, whether visual or verbal. Think about the hundredth monkey theory.
639646
You should not confuse and animal that is albino with and animal that is merely white. For instance you can get white tigers that are not albino and you can tell because they have blue eyes (which indicates that they do it fact produce melanin - an albino can't). \n\nPigmentation is usually determined by multiple genes. It isn't just matter of IF the pigment is produced but WHERE it is distributed, WHEN it is produced (genes can turn on and off) and in what QUANTITY. So even if it has a working pigment gene it doesn't mean it will be expressed everywhere in the same way or at all. \n\nThere are all sorts of things that can contribute to the pattern of an animal. For instance Tortoise shell patterned cat are all female. Their pattern is due to the fact that the pigment genes are on the X chromosomes (of which famle cats have two). In females one of the two chromosome partially deactivates to stop them over producing certain proteins. This deactivation happens at random. Thus if the X chromosomes have different pigment alleles (gene variants) the cat will get patchs of different colours over its body. I don't know exactly how it works in pidgeons, but the point is it isn't down to one gene or even JUST genes but to other factors as well.
1126013
Birds and reptiles have better color vision than humans\nMost mammals have poor color vision by human standards.\nPrimates have vision like humans.\n\nColor vision arises from photoreceptor cells in the eye called cones. \n\nBirds and reptiles have four different kinds that are sensitive to four different wavelength ranges. Most mammals have only two types having lost half somewhere in the distant past due to mutations. Most of the mammals that lived in the shadow of the dinosaurs were nocturnal, so color vision wasn't very useful to them anyway.\n\nPrimates have the same two kinds of cones that mammals, birds and reptiles have in common, but unlike other mammals they have a third type which is unique to primates, it arose via a mutation and allows human style color vision. It's sort of an awkward compromise when compared with birds and reptiles though. They can see UV light, we cant'\n\nI'd add that any nocturnal animal regardless is less likely to have good color vision, because overall light intensity is sensed by a different kind of photoreceptor cell (rods) and good night vision requires more rods than cones. You can't have your cake and eat it too.\n\nI don't know much about fish and amphibians. \n\nSome insects have very good color vision in tems of color perception. Any of the ones that co-evolved with flowering plants would see color better than usb ecause of that extended spectrum thing. Although the specifics of their vision systems aren't familiar to me.\n\nI only know the stuff on bird, mammal and primate vision because of an article in a recent issue of Scientific American.
256069
As far as I know, all birds can see color in the complete visible spectrum and into the UV wavelenghts. All birds should be able to see blue. I've read that their ability to distinguish color variations is much greater than our own.
276633
No. \nHumans see the color purple as stimulation of red AND blue receptor (Purple is not a primary color). \nAnyway, whatever colorblindness you have, it never would affect only one color, because the ratio of the excitation of two or more different types of photoreceptors contributes to most colors (You have only three different kinds of color receptors, but you can see millions of colors). \nSo deficiency in one photoreceptor type affects not only its primary color but many others too. \n\nA nice webpage for a simulation of how color blind people see colors are \nhttp://www.vischeck.com/\nhttp://jfly.iam.u-tokyo.ac.jp/html/color_blind/text.html#see