archaeopteryx

• طائر منقرض بدائي مسنن من العصر الجوراسي، يتميز بذيل طويل مكسو بالريش وعظام مجوفة، ويُعد غالبًا أكثر الطيور بدائية.

An extinct primitive toothed bird from the Jurassic period, characterized by a long feathered tail and hollow bones, often considered the most primitive of all birds.

1. Extinct primitive birdC2formalscientific

   An extinct primitive toothed bird of the Jurassic period, having a long feathered tail and hollow bones; usually considered the most primitive of all birds.

   طائر بدائي منقرض

   • The archaeopteryx is often considered a transitional fossil between dinosaurs and modern birds.
   • Fossils of archaeopteryx have been found in Germany.
   • Scientists study archaeopteryx to understand the evolution of flight.