Archaeopteryx The Berlin specimen of the first bird (Archaeopteryx lithographica) is considered the most famous fossil of the world. It is about 150 million years old and was discovered in limestone deposits in Eichstaett / Bavaria. Archaeopteryx has both characteristics, such as bird flight feathers and leg and reptile features such as a tail bone and the front claws. He is regarded as a kind of transitional form between dinosaurs and birds.
A Lazarus species (or taxon) is "an animal or plant which disappears from the fossil record, presumably because it is extinct, and then reappears. In some cases, an animal which is thought to be totally extinct may be spotted and described alive, sometimes millions of years after the last fossil evidence of the species has vanished.