Dear Kitty. Some blog

This 2013 video says about itself:

Microraptor | Flying Dinosaur | Planet Dinosaur | BBC

Planet Dinosaur takes to skies, to investigate the perculiarities of winged dinosaurs. Microraptor had feathers for gliding but is it enough to escape from Sinornithosaurus?

From PLOS:

Running may have made dinosaurs’ wings flap before they evolved to fly

New evidence suggests that passive wing flapping may have arisen earlier than gliding flight

May 2, 2019

Before they evolved the ability to fly, two-legged dinosaurs may have begun to flap their wings as a passive effect of running along the ground, according to new research by Jing-Shan Zhao of Tsinghua University, Beijing, and his colleagues.

The findings, published in PLOS Computational Biology, provide new insights into the origin of avian flight, which has been a point of debate since the 1861 discovery of Archaeopteryx. While a gliding type of flight…

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