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In page Carolina parakeet:

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A fossil parrot, designated Conuropsis fratercula, was described based on a single humerus from the Miocene Sheep Creek Formation (possibly late Hemingfordian, c. 16 mya, possibly later) of Snake River, Nebraska.[4] It was a smaller bird, three-quarters the size of the Carolina parakeet. "The present species is of peculiar interest as it represents the first known parrot-like bird to be described as a fossil from North America." (Wetmore 1926;[4] italics added) However, it is not completely certain that the species is correctly assigned to Conuropsis,[5] but some authors[citation needed] consider it a paleosubspecies of the Carolina parakeet.[Note 2]