Gastornis parisiensis was a large, flightless bird from the Paleocene and Eocene epochs, known for its massive size, strong legs, and formidable beak. It inhabited subtropical forests in Europe, likely preying on small animals or feeding on tough vegetation.

Gastornis parisiensis, commonly known as Gastornis, was native to Europe during the Paleocene to Eocene epochs, approximately 56 to 41 million years ago. Fossil evidence primarily places this species in western and central Europe, including areas that are now part of France and Germany.

During the time Gastornis parisiensis existed, Europe experienced a warm and humid climate. The environment was likely subtropical to tropical, with dense forests providing abundant vegetation.

Gastornis parisiensis is believed to have been a large, flightless bird that occupied a niche similar to that of a large herbivore or omnivore. Its robust build and large beak suggest it could have fed on a variety of plant materials or possibly small animals, depending on availability. The dense forest habitat would have offered ample food resources and cover from predators.