• Skip to Page Content
  • Skip to Site Navigation
  • Skip to Search
  • Skip to Footer
American Museum of Natural History
Share
OLogy Home
Games
Reading
Hands-on
Videos
Biology
Biodiversity
Brain
Genetics
Marine BiOLogy
MicrobiOLogy
PaleontOLogy
ZoOLogy
Human Cultures
AnthropOLogy
ArchaeOLogy
Earth & Space
Astronomy
Climate Change
Earth
Physics
Water
Type keyword(s) to search OLogy

OLogy Cards > Diatryma gigantea

OLOGY CARD 002
Series: Extinct Animal

Diatryma gigantea

This extinct bird grew as tall as a basketball player and weighed over 150 kilograms (330 pounds)! It also had heavy legs and tiny wings. Of course, this big bird couldn't fly. Diatryma fossils have been found in North America and Europe, from a time 10 million years after the extinction of most dinosaurs.

Scientific Name: Diatryma gigantea 
Pronunciation: die-uh-TRY-muh
jy-GAN-tee-uh
Meaning: "double hole"
Locality Found: South Elk Creek, Big Horn Basin, Wyoming
Age: Early Eocene, 55 million years ago
Size: 2 meters (6.5 feet) tall
Characteristics: large-headed, flightless bird with short and heavy leg bones; beak indicates that Diatryma may have been a herbivore

Diatryma's closest relatives living today are:

ostriches

ducks and geese

penguins

Correct!

Despite its gigantic bones, paleontologists believe that Diatryma is most closely related to ducks and geese.

diatryma gigantea skull

Diatryma's beak is straight, not hooked. What did this dinosaur probably eat when it was alive?

meat

plants

no one knows

Correct!

We don't know for sure, but Diatryma's beak is similar to that of living, leaf-eating birds.

Paleontologists know that Diatryma is a bird because it has a fused tailbone.

Fact
OR
Fiction
?

Fact

Diatryma has a short tail with joined vertebrae at the end. All ancient and modern birds have this feature.

Although Diatryma gigantea couldn't fly, its fossils suggest it was probably a speedy runner.

Fact
OR
Fiction
?

Fiction

Diatryma was no roadrunner. Ostriches can sprint to 65 kilometers (40 miles) per hour, but this bird's weight and heavy legs made it much slower.

Image credits: main image, Rick Spears; stumper, © AMNH.

You might also like...

Beyond T. rex

Meet some of the more unusual members of T. rex and Velociraptor's family tree.

Ask a Scientist About Dinosaurs

Paleontologist Mark Norell answers kids’ questions.

Tree of Life

Explore this family tree of living things on Earth.

Page footer
  • Contact Us
  • OLogy Cards
  • For Educators
  • Credits
  • Privacy Policy
  • Copyright
  • OLogy Sitemap