Baby pterosaurs may have hatched ready to fly right out of the egg

The prehistoric pterosaurs that lived alongside dinosaurs grew well-developed wings while still in their eggs, which may have let them fly soon after hatching

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Pterosaurs may have been able to fly as soon as they hatched

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Did all pterosaurs look the same? - Quora

Baby Pterosaurs or Flaplings are born with well-developed wing bones/muscle: While colonial breeding/parental care is widespread among the family, it's believed Pterosaurs could fly shortly after hatching, sooner than any other animal. (

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Powered flight in hatchling pterosaurs: evidence from wing form and bone strength