Evolutionary biologists report they have analyzed a fossil of an extinct giant meat-eating bird -- which they say could be the largest known member of its kind -- providing new information about ...

The fossilized leg bone of a giant “terror bird” discovered in Colombia provides new insights into ancient South American ...

While past terror bird fossils placed the meat-eating birds at 3 to 9 feet tall, new findings suggest that some were even ...

Terror birds were apex predators some 12 million years ago in South America. A newly published discovery could be the largest yet.

Fossil of an extinct Phorusrhacid "terror bird" in the Tatacoa Desert reveals insights into ancient predators and ecosystems.

A Colombian rancher has discovered a fossilized bone that points to the existence of a giant terror bird species. The fossil, ...

19A. This clue includes two qualifiers, not one. The [Northernmost city in North America with over one million people] is ...

The reason for this is that woodpeckers need to use this superhero-like pecking ability to carve out shelter, uncover and consume insects, and communicate with other woodpeckers. There are 239 species ...

The greater sage-grouse is the largest grouse in North America. Its lives in the sagebrush country of the western United States and southern Alberta and Saskatchewan. Adults have a long ...

The fossil of a massive predator called a terror bird that roamed South America 12 million years ago is from the largest ...

Grey wolves and coyotes, distinct North American canids, exhibit unique survival strategies. While larger wolves form packs to hunt large prey, smalle ...

We are measuring one thing—breeding birds—but birds have to survive the rest of the ... exhibiting the steepest population ...