Regarding the biology of flying

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SUMMARY

This discussion centers on the biological limitations of flying creatures, specifically regarding weight and atmospheric conditions. The user references a formula for determining the maximum weight of flying species, derived from a presentation available through MIT's OpenCourseWare. The conversation highlights that Texas Pterosaurs could weigh between 100 to 200 kg, while the Kori Bustard, the heaviest modern flying bird, weighs approximately 20 kg. The consensus is that current atmospheric conditions likely prevent the existence of heavier flying species.

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  • Understanding of basic physics principles, particularly gravity and atmospheric pressure.
  • Familiarity with biological adaptations of flying species.
  • Knowledge of paleontology, specifically regarding Pterosaur anatomy and weight estimates.
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  • Research the physics of flight in relation to gravity and atmospheric pressure.
  • Explore the anatomy and weight limits of modern birds, focusing on species like the Kori Bustard.
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  • Review the MIT presentation on the physics of flight for detailed formulas and calculations.
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Alan McIntire
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I recently watched a rerun of "Jurassic World" on TV. Seeing the pterodactyl attack, I got to thinking;
Is there a formula to determine the maximum weight a flying bird, bat, pterodactyl, or whatever can have given the force of gravity g at the planet's surface, and the atmospheric pressure?
 
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jedishrfu said:
Check this presentation it derives a formula for that:

Thank you for the link. When I was watching the Pterodactyl attack, I thought it was unbelievable that any living creature could pick up a grown human.

The Texas Pterosaurs were supposed to have a mass of 100 up to 200 Kg. Nowadays, the most massive flying bird is the Kori Bustard, with a mass of about 20 Kg. I don't think more massive fliers can exist with our current atmosphere.
 

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