long-tailed sylph (IMAGE)

Washington University in St. Louis

long-tailed sylph

Caption

Hummingbirds use the hibernation-like state of torpor in varying ways, depending on their physical condition and what is happening in their environment, according to new research from Washington University in St. Louis and Colombian biologists. Here, a male long-tailed sylph (Aglaiocercus kingii) forages at La Minga Ecolodge, Valle del Cauca, Colombia.

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Justin Baldwin

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