最終更新日：2024/08/02
Hesperornithids were a group of flightless seabirds that lived during the Mesozoic era.
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Hesperornithids were a group of flightless seabirds that lived during the Mesozoic era.
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Hesperornithids were a group of flightless seabirds that lived during the Mesozoic era.
Hesperornithids were a group of flightless seabirds that lived during the Mesozoic era.
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