<i>Eocypselus rowei</i>, Wyoming (IMAGE)

National Evolutionary Synthesis Center (NESCent)

<i>Eocypselus rowei</i>, Wyoming

Caption

12 centimeters from head to tail, E. rowei was an evolutionary precursor to the group that includes today's swifts and hummingbirds.

Credit

Photo contributed by Lance Grande of the Field Museum of Natural History

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