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Title : Butterfly Found To Have Fifteen Different Types Of Photoreceptors
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Butterfly Found To Have Fifteen Different Types Of Photoreceptors

Photoreceptors id = " The human eye has three different types of cone cells, known as photoreceptors, allowing us see millions of different colors. Animals have number of these receptors, allowing some species, such as varying insects, for wavelengths of light invisible to us. have discovered a species of butterfly that has at least 15 different types. To date, the largest number of different photoreceptors found in the eye of an insect was nine, that is enough Awesome. But researchers in Japan have just reported that
This allows butterflies to see not only the wavelengths, and therefore the colors, we can see, but ultraviolet light and polarized as well. However, although one might think that this would mean that butterflies are able to see shades of unimaginable for us color, researchers do not believe that actually work that way. Rather, additional photoreceptors allow them to detect very specific environmental stimuli. These butterflies have the highest number of types of photoreceptors known for any insect. Kazuo Unno The study, published in Frontiers in Ecology and Evolution examined the visual system of the common blowfly ( Graphium Sarpedon ) , a native of Australia and butterfly known for their blue and green iridescent wings. Researchers were interested in how different photoreceptors evolved as ancestor to all insects are thought to only have three. Regarding blowfly, 15 different types of photoreceptors, with different wavelengths which stimulate different receptors found. One was found to be reactive to ultraviolet light, another violet, three different wavelengths of blue, blue-green one, four to green, and five on the red light. However, researchers believe that insects use only four of these receptors for color vision every day, raising the question of the need for another 11. It is believed that additional receptors to help butterflies see other stimuli, such as fast companions flying butterflies against the sky (because of its ability to discern small variations in the blue-green spectrum) or objects hidden colors in vegetation. The mantis shrimp currently holds the record with 16 photoreceptor different types, but this does not mean more colors looks. Richard Witcombe / Shutterstock The discovery that the common blueblottle has 15 receivers almost puts it on par with the species that currently holds the record - shrimp coral-dwelling mantis, with an impressive 16 different photoreceptors in their eyes. But, again, a study looking at the ability of the mantis shrimp to distinguish between different colors found that the crustacean was not so good at the task as previously expected, and that the idea of ​​shrimp had some kind of "super color vision" was incorrect. "Butterflies can have a visual acuity slightly lower than ourselves, but in many ways to enjoy a clear advantage over us: they have a large field, a superior ability to track fast-moving objects and even can distinguish ultraviolet and polarized light, " says Kentaro Arikawa, the lead author of the study. "Is not it fascinating to imagine how these butterflies see your world?"
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