Ichthyornis, as we have mentioned, is one of those more widely known fossilized birds. Its remains have been found north to south along the entire coast of what was once the inland sea that spread across North America during the Cretaceous when it floated and darted about the sky with other contemporary birds and the last of the pterosaurs. Adults and immature specimens of the bird have been found, which allows a lifeline study of members of the species and most undoubtedly allowed for the exhaustive amount of research we saw yesterday, of course, being one of the most commonly found fossils in a given formation of earth also helps in allowing for more and more study to be done on an animal. The original panel of the composite of pieces labeled I. victor, a now unused synonym, shown below, is almost comical in its near completeness and arrangement. It almost looks like the bird was in the midst of stretching its wings when it was frozen in time, and plaster.
The list of synonyms after Clarke's study, and Michael Mortimer's assertion that the species should be I. ancesps rather than I. dispar after a more senior synonym, has become fairly large. I. dispar, however, still holds as the name of the species instead of I. ancesps. There is, sometimes though it has grown exceedingly rare since the 1950's, the belief that the jaws still belong to a young Clidastes rather than to a bird; Clidastes is the smallest known mososaur.