Archaeopteryx
The archaeopteryx roamed the south of Germany in the late Jurassic. It is considered the very first bird species, although many of its features (teeth, wing claws, bony tail) are clearly still dinosaur-like rather than avian. It had the first ever-recorded asymmetric wing feathers, one key characteristic which helps the lift in the flap of modern birds: however the asymmetry was not yet very pronounced, making flight possible but difficult
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Archaeopteryx
