“ | A familiar sight on the coasts of the Cretaceous. These birds are called Hesperornis. They're so vociferous, it's defining being right in the middle of a colony. They're flightless, like penguins, but they're far from as cute. | „ |
— Allen Johnson, about Hesperornis in Death of a Dynasty: To Hell... And Back |
Hesperornis (name meaning "Western Bird") is a genus of cormorant-like flightless bird that originated during the Late Cretaceous period in what is now North America. Measuring 2 meters long and due to its design, it was cumbersome on land but was a fabulous swimmer.
In the Series 2 finale "Death of a Dynasty: To Hell... And Back", a large colony of Hesperornis were brought to the park from Late Cretaceous Montana, 65 million years ago. They reside in the Primeval Aquarium Enclosure.
Facts[]
Era & Discovery[]

Hesperornis skeleton
Physical Attributes[]
Behavior & Traits[]
Journal Entry[]
Gallery[]
Trivia[]
- The sound effects of Hesperornis are that of donkey, seal/sea lion, and vulture.