Which are the ancestors of our birds? (Part 2)

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PHORORHACOS
Phororhacos is a genus of long extinct flightless birds that were about 1.5m long. It had long sturdy legs, short wings, a large skull, a large heavy body and a large beak. This carnivore may have eaten small mammals probably killing them with its beak and legs. It looked like an ostrich with a large head. It lived during the Oligocene Epoch about 30 million years ago. It's fossils have been found in Patagonia, South America.

ICHTHYORNIS
Ichthyornis (meaning fish bird) were 20cm long, toothed, tern like, extinct bird that date from the large head and beak. This powerful flyer is the oldest known bird that had a keeled breastbone similar to that of modern birds. It lived in flocks nesting on shorelines, and hunted for fish over the seas. Ichthyornis was originally found in 1872 in Kansas,United States of America.

PROTOAVIS
Protoavis (meaning first bird) is an extinct diapsid from the late Triassic Period (80 million years earlier than late Archaeopteryx). It's partly toothless jaw and keel-like breastbone were like those of birds. It also had a tail dinosaur like rear legs, and hollow bones. There is some dispute about whether this animal was a bird or a dinosaur; the answer depends partly on whether the Protoavis fossil belongs to one or two different genera. It's fossil have been found in Texas, United States of America.

IBEROMESORNIS
Iberomesornis means intermediate bird. It was a small toothed bird that lived during the early Cretaceous period. It was capable of powerful flight. It had tiny, spiky teeth in its beak and was the size of a sparrow. Paleontologist Sanz and Bonaparte named it in 1992. Fossils of this bird were found in Spain.

PATAGONYKUS
Patagonykus was a lightly built meat eater with a single clawed finger on each hand. It was about 2m long. It had long legs, a long tail and short arms. Patagonykus lived during the late Cretaceous period, about 90 million years ago. Patagonykus was either a bird like dinosaur or a primitive bird. It possessed qualities of both groups of animals and their is much scientific debate over which it is. Patagonykus was similar to Mononykus. This birds fossil were found in Patagonia, a region of Southern Argentina.

TERATORNIS
Teratornis meaning monster bird was an early condor-like bird. This giant extinct predator had a wingspan of roughly 5-7m. This carnivore dates from the Pleistocene Epoch, about 1.8 - .01 million years ago.