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Birds
Part 1 of Paper
....l. Some use claws, others use only their
beaks. come in many varieties of colors and sizes.
are warm-blooded, egg-laying creatures from the aves class. Along
with the obvious feathers and wings, birds have other adaptations for flying
such as a wide keel on the sternum, with large wing muscles attached, air spaces
an.... Part 2 of Paper
....cate bones, few fossils
have been left behind for scientists to study. The earliest bird fossils come
from archaeopteryx. The fossils that have been discovered from archaeopteryx
include six partial skeletons and one single feather. Archaeopteryx , unlike
modern birds, had teeth, a reptile like tail, and three claws on each wings.
Scientists think it could fly, but only weakly.
Approximately 85 species and 50 sub species have become extinct in the
last 300 years. Over half of them occurred in .... |
| Number of words: 751 - Approximate pages: 3 |
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