Hesperornithes

Hesperornithes is an extinct and highly specialised clade of Cretaceous toothed birds. Hesperornithean birds, apparently limited to former aquatic habitats in the Northern Hemisphere, include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and Potamornis, all strong-swimming predatory waterbirds. Many, if not all species were completely flightless. The largest known hesperornithine, described in 1999 and named Canadaga arctica, may have reached a maximum adult length of over 1.5 metres (5 ft). For more information, visit the Wikipedia entry. Get back to Aves

†Hesperornis