image: A hovering long-billed hermit (Phaethornis longirostris) inverts and strongly twists its wings during the upstroke to generate elevated lift effectively. This material relates to a paper that appeared in the Sept. 26, 2018, issue of Science Advances, published by AAAS. The paper, by R. Ingersoll at Stanford University in Stanford, CA, and colleagues was titled, "Biomechanics of hover performance in Neotropical hummingbirds versus bats." view more
Credit: Glenn Barley: <a target="_blank" href="http://www.glennbartley.com/">www.glennbartley.com</a>