Hesperornis (Primeval by Character Options)
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Hesperornis is an extinct genus of flightless aquatic birds that lived during the late Cretaceous. Fossils have been found in Kansas and Canada. The first fossils had been dug out by Othniel C. Marsh himself during the famous “Bone Wars”. Hesperornis, a lesser-known discovery from that era, could reach 1,5m or even a little more in length.