Gargantuavis

Gargantuavis was a genus of prehistoric bird, possibly closely related to Patagopteryx, containing thus far a single species, Gargantuavis philoinos.[1] It lived during the Late Cretaceous in what is now southern France, in the Marnes Rouges Inferieures Formation dated to around 70 mya.[1] A large bird, Gargantuavis was flightless, occupying an ecological niche somewhat similar to that of modern ratites or certain non-avian dinosaurs.[1] It is possible that some of the fossil eggs found in the region, usually attributed to non-avialan dinosaurs, actually belong to this bird.

Description
Gargantuavis is known from three or possibly four bones: a synsacrum (the fused vertebrae above the hip), a partial illia (hip bone), and a partial femur (upper leg bone), which was referred to the species based on the fact that it seems to fit well with the hip. A second partial synsacrum similar to the type specimen had been described in 1995, and may also belong to Gargantuavis.