A pair of 160-million-year-old dinosaur species, Yi qi and Ambopteryx longibrachium, had stretched-skin wings similar to those of bats but they weren't very good at flying, according to a study of their anatomies published in iScience. The dinosaurs, about the size of modern crows, could only glide from tree to tree, a behavior that, researchers say, ultimately died away.
Dinosaurs with bat-like wings didn't fly very well
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