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Ischadium recurvum

Paul Fofonoff

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Littorina littorea

April Blakeslee

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Esox lucius

Courtesy of iCom, artist unknown

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Etheostoma blennioides

Wiki Commons

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Tussilago farfara

null

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Craspedacusta sowerbii

OpenCage (CC-BY-SA-2.5 license) via Wikimedia Commons

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Lepomis megalotis

1800s Government publication

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Polygonum hydropiper

U.S. Agricultural Research Service 1971

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Ctenopharyngodon idella

Pavel Dvorak

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Branta canadensis

Paul Fofonoff

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