A forked tongue is a tongue split into two distinct tines at the tip; this is a feature common to many species of reptiles. Reptiles smell using the tip of their tongue, and a forked tongue allows them to sense from which direction a smell is coming. Sensing from both sides of the head and following trails based on chemical cues is called tropotaxis. It is unclear whether forked-tongued reptiles can actually follow trails or if this is just a hypothesis.
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| - Forked tongue (en)
- Langue bifide (fr)
- Gespleten tong (nl)
- Língua bifurcada (pt)
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| - Une langue bifide est une langue présentant deux extrémités séparées. Dans le langage courant une langue fourchue est le symbole du mensonge et de la duplicité, une double langue indiquant une « double parole », une des deux n'étant pas la vérité. (fr)
- Een gespleten tong, lingua bifurcata of lingua bifida is een eigenschap van de tong van sommige reptielen zoals slangen, skinken en varanen. Bij de mens is het een zeldzame medische aandoening waarbij de tong in twee delen is verdeeld. (nl)
- A língua bifurcada é uma característica comum aos répteis. Que pode ser aplicada a língua do ser humano. (pt)
- A forked tongue is a tongue split into two distinct tines at the tip; this is a feature common to many species of reptiles. Reptiles smell using the tip of their tongue, and a forked tongue allows them to sense from which direction a smell is coming. Sensing from both sides of the head and following trails based on chemical cues is called tropotaxis. It is unclear whether forked-tongued reptiles can actually follow trails or if this is just a hypothesis. (en)
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| - A forked tongue is a tongue split into two distinct tines at the tip; this is a feature common to many species of reptiles. Reptiles smell using the tip of their tongue, and a forked tongue allows them to sense from which direction a smell is coming. Sensing from both sides of the head and following trails based on chemical cues is called tropotaxis. It is unclear whether forked-tongued reptiles can actually follow trails or if this is just a hypothesis. Forked tongues have evolved in these squamate reptiles (lizards and snakes) for various purposes. The advantage to having a forked tongue is that more surface area is available for the chemicals to contact and the potential for tropotaxis. The tongue is flicked out of the mouth regularly to sample the chemical environment. This form of chemical sampling allows these animals to sense non-volatile chemicals, which cannot be detected by simply using the olfactory system. This increased ability to sense chemicals has allowed for heightened abilities to identify prey, recognize kin, choose mates, locate shelters, follow trails, and more. Forked tongues have evolved multiple times in squamates. It is unclear, based on the morphological and genetic evidence, where the exact points of change are from a notched tongue to a forked tongue, but it is believed that the change has happened two to four times. A common behavioral characteristic that has evolved in those with forked tongues is that they tend to be wide foragers. Hummingbirds also have tongues that split at the tip. Galagos (bushbabies) have a secondary tongue, or sublingua, used for grooming, hidden under their first. (en)
- Une langue bifide est une langue présentant deux extrémités séparées. Dans le langage courant une langue fourchue est le symbole du mensonge et de la duplicité, une double langue indiquant une « double parole », une des deux n'étant pas la vérité. (fr)
- Een gespleten tong, lingua bifurcata of lingua bifida is een eigenschap van de tong van sommige reptielen zoals slangen, skinken en varanen. Bij de mens is het een zeldzame medische aandoening waarbij de tong in twee delen is verdeeld. (nl)
- A língua bifurcada é uma característica comum aos répteis. Que pode ser aplicada a língua do ser humano. (pt)
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