Hesperornis gracilis

† Hesperornis gracilis — an extinct avian from United States from the Late Cretaceous period. Piscivore. Discovered in United States; contributes to the local paleofaunal record.

Diet & Feeding

Piscivore

Hesperornis gracilis was a fish-eating dinosaur. Piscivores typically lived near water sources and had specialized adaptations such as elongated snouts and conical teeth for catching fish.

Time Period

Cretaceous Late Mesozoic Era

Hesperornis gracilis lived during the Cretaceous Late period of the Mesozoic Era, approximately 100.5 to 66.0 million years ago.

The final age of dinosaurs, featuring iconic species like Tyrannosaurus rex, Triceratops, and Velociraptor. Dinosaurs reached their peak diversity before the catastrophic asteroid impact at the Chicxulub crater ended the Mesozoic Era.