BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Purple-throated woodstar (Calliphlox mitchellii) male in flight. This is a type of hummingbird. Hummingbirds are small birds that feed on the nectar of plants and hover in mid-air by rapidly flapping their wings. Photographed in a cloud forest in Ecuador.
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