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The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero Batman.It is a specially modified searchlight with a stylized emblem of a bat affixed to the light, allowing it to project a large bat symbol onto cloudy night skies over Gotham City.
Vampire bat Desmodus rotundus. Vampire bats have developed a specialized system using infrared-sensitive receptors on their nose-leaf to prey on homeothermic (warm-blooded) vertebrates. [1] Trigeminal nerve fibers that innervate these IR-sensitive receptors may be involved in detection of infrared thermal radiation emitted by their prey. This ...
The term echolocation was coined by 1944 by the American zoologist Donald Griffin, who, with Robert Galambos, first demonstrated the phenomenon in bats. [1] [2] As Griffin described in his book, [3] the 18th century Italian scientist Lazzaro Spallanzani had, by means of a series of elaborate experiments, concluded that when bats fly at night, they rely on some sense besides vision, but he did ...
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All species examined had retinae with both rod cells and cone cells, but only the Pteropus species had S-cones, which detect the shortest wavelengths of light; because the spectral tuning of the opsins was not discernible, it is unclear whether the S-cones of Pteropus species detect blue or ultraviolet light. Pteropus bats are dichromatic ...
Mexican free-tailed bats are typically 9 cm (3.5 in) in length and weigh around 7–12 g (0.25–0.42 oz) with females tending to be slightly heavier than males by 1–2 grams for increased fat storage to use during gestation and nursing. [8]
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