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Phorusrhacids
| Scientific Classification |
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The Phorusrhacids (which means "rag bearers"), popularly known
as "terror birds" were large carnivorous flightless birds
that were native to South America - although some species did
manage to establish themselves in North America after the
Isthmus of Panama land bridge arose about 3 million years ago.
Phorusrhacids first appeared in the Paleocene epoch, about
62 million years ago, and survived until the late Pliocene,
about 2 million years ago.
Many Phorusrhacids were quite small, about to 2 to 3 feet (0.6 to 0.9 meters)
tall, but the largest species were enormous standing 10 feet (3 meters)
tall. The larger species were almost certainly fast runners, and might have been
able to reach speeds of as much as 30 mph (48 km/h).
Phorusrhacids are believed to have generally have beaks with a hooked-curve,
similar to that of an eagle, and additionally their feet may have had sharp claws.
Generally speaking, most Phorusrhacids had shorty, stubby and effectively useless
wings, however the wings of one genus, Titanis, seem to have a joint-like
structure, digits that could flex to some degree (unlike the fused digits of most birds),
and may even have ended in a clawed finger.
Click here for more Phorusrhacid Pictures
Phorusrhacids were carnivorous (meat-eating) birds that lived between 62 and 2 million years ago
Related Information & Resources
See Also
Phorusrhacid Books
Here are some books from Amazon.com:
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By Gerald Mayr
Springer
Paperback (275 pages)
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Click Here | Product Description:
The present book is the first detailed review of the Paleogene avian fossil record on a worldwide scale. Numerous well-preserved fossil bird remains from this geological period, which covers the time span from the end of the Mesozoic era to the beginning of the Miocene, have been described in the past two decades. Some of these not only provide information on morphological transformations in the evolutionary history of the extant avian taxa, but are also of great significance for an understanding of their historical biogeography. Others represent extinct taxa which sometimes show a bizarre morphology not found in modern birds, such as the giant pseudo-toothed birds which reached wingspans up to six meters. The reader is introduced to basic morphological features of the various groups which, as far as possible, are placed into a phylogenetic context in the light of current hypotheses on the interrelationships of extant birds. In a concluding chapter the biogeographical significance of Paleogene fossil birds and possible reasons for faunal changes during the Paleogene are detailed. As such, the book not only aims at providing an overview for specialists, but may also help students of other fields of vertebrate paleontology to better understand Paleogene ecosystems. |
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By Peter F. Murray
Indiana University Press
Released: 2004-03-04
Hardcover (416 pages)
 | List Price: $49.95*
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Over millions of years, Australia's unique biodiversity has produced a large cabinet of curiosities. Among the weirder members of this group were the Mihirungs, members of the now extinct family Dromornithidae. Made up of several genera of flightless birds—among them one of the very largest birds that ever lived—the dromornithids ranged from 60-kilogram beasts, 1.5 meters tall, to giants twice that size, weighing nearly half a metric ton. They were, by orders of magnitude, the largest "geese" that ever lived. One species was comparable in size to the Ele-phantbird of Madagascar and the Giant Moa of New Zealand. This book is the first major study of this unique and highly diverse group. It aims to present as complete a synthesis as possible of current information about this fascinating family of birds. |
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By Alan Feduccia
Yale University Press
Paperback (480 pages)
 | List Price: $40.00*
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An exploration of all that is known about the origin of birds and of avian flight. It draws on fossil evidence and studies of the structure and biochemistry of living birds to present knowledge and data on avian evolution and to propose a new model of this evolutionary process. |
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By Chris Lavers
St. Martin's Griffin
Paperback (288 pages)
 | List Price: $13.95*
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Why Elephants Have Big Ears is the result of one man's lifelong quest to understand why the creatures of the earth appear and act as they do. In a wry manner and personal tone, Chris Lavers explores and solves some of nature's most challenging evolutionary mysteries, such as why birds are small and plentiful, why rivers and lakes are dominated by the few remaining large reptiles, why most of the large land-dwellers are mammals, and many more.
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