Thursday, May 6, 2010


Pterosaurs and birds both have exceptionally sharp vision. We saw earlier that they also have similar brains."
Like modern birds, pterosaurs were also distinguished by their sharp vision (a necessity for hunting from hundreds of feet in the air!), which entailed a bigger-than-average brain than terrestrial or aquatic reptiles. Using advanced techniques, scientists have even been able to "reconstruct" the size and shape of the brains of some pterosaur genera, proving that they contained more advanced "coordination centers" than comparable reptiles."

"Birds have acute eyesight - raptors have vision eight times sharper than humans - thanks to higher densities of photoreceptors in the retina (up to 1,000,000 per square mm in Buteos, compared to 200,000 for humans), a high number of optic nerves, a second set of eye muscles not found in other animals, and, in some cases, an indented fovea which magnifies the central part of the visual field."


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