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La Brea Geology
La Brea Flora and
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Birds of Rancho
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Human Exploration
and Excavations

Birds of Rancho La Brea
Aves

Merriam's teratorn
Merriam's Teratorn
Golden eagle
Golden Eagle

Bird fossils are very rare because their bones are hollow and quite fragile. At Rancho La Brea, however, the preservative effect of the asphalt has resulted in one of the largest collection of fossilized birds in the world. The more than 100,000 bird fossils found at Rancho La Brea include different kinds of birds of prey, waterfowl and songbirds.

Larger birds of prey, such as eagles, hawks, and falcons are represented by more than 20 different species. They include two kinds of eagles still found today in North America, the Golden Eagle and the Bald Eagle, as well as several extinct species such as Woodward's Eagle and Grinnell's Crested Eagle. These extinct eagles have living relatives that are found only in Central and South America.

Other types of birds were also recovered from Rancho La Brea. Condors and vultures were carrion feeders and direct ancestors of those still native to North America such as the endangered California Condor.

One of the most extraordinary birds found at Rancho La Brea belongs to the extinct type of birds known as teratorns. Over 100 individuals of one of these species, Merriam's Teratorn, have been discovered. These birds have a skeletal structure similar to condors. However, modern research has indicated that these birds were active predators that stalked their prey on the ground, not in the air like other birds of prey, or by feeding on carrion like condors.

Turkey
California Turkey
Foot Note!
Merriam's Teratorn was the largest bird recovered from the asphalt deposits at Rancho La Brea. It stood over two and a half feet tall, weighed over 30 pounds and had a wingspan of over 10 feet!

 

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