Astrophile
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- Aug 30, 2013
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So why does the Late Cretaceous bird Ichthyornis occur lower than the Clupeidae (the herring family), which is Early Eocene to Recent?Obviously birds will end higher up than fish, because of their volume to weight ratio.
See https://en.wikipedia.org/wiki/Ichthyornis and https://en.wikipedia.org/wiki/Clupeidae
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