The Pheasant-Tailed Jacana Protects Its Young
The male jacana gathers his young beneath his wings for protection—whether from predators or inclement weather.
© BlackBoxGuild—Creatas Video+/Getty Images
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© EcoView/FotoliaA flock of red-billed queleas (Quelea quelea), Etosha National Park, Namibia.
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© MinuteEarth (A Britannica Publishing Partner)A survey of the largest known single living organisms on Earth, which includes representatives from the animal, plant, and fungal kingdoms.
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Contunico © ZDF Studios GmbH, MainzA dominant female meerkat expelling a subordinate from the pack.
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Encyclopædia Britannica, Inc.Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.