Allen’s Hummingbird, Santa Cruz. — Old Guv Legends

A male Allen’s hummingbird (Selasphorus sasin) near Santa Cruz, CA. Image credit: Shravans14 / CC BY-SA 4.0. Since the 1830s, ornithologists have assumed that hummingbirds drink by capillary action (wicking), the passive process of a fluid rising into a narrow tube because of forces attracting the liquid to the tube’s solid internal surface. A new […]

via Allen’s Hummingbird, Santa Cruz. — Old Guv Legends

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