This order includes only an extinct N. American bird hesperornis.
The less numerous hesperornis group were large and powerful divers.
They've named him the "hesperornis," which means "western bird."
They are of two leading types, of which the Ichthyornis and hesperornis are the standard specimens.
It was over twenty feet across his wings, from tip to tip; and, like the hesperornis, he always had fish for dinner.
Another (hesperornis regalis) stood five or six feet high, and had rudimentary wings like those of the Penguins.
They crept on all fours, they climbed with fingers and toes, they dived headlong, and swam as skilfully as any hesperornis of old.
The wing of hesperornis, for example, is now declared to be an instance of degeneration from one capable of flight.