What is the modern favored hypothesis regarding the primary diet of *Gastornis*?

Answer

Herbivorous, specializing in cracking hard nuts and seeds.

More recent detailed examinations strongly favor the hypothesis that *Gastornis* was primarily herbivorous, with its deep and blunt beak perfectly adapted for cracking very hard, thick-shelled nuts and seeds plentiful in the Paleocene forests.

What is the modern favored hypothesis regarding the primary diet of *Gastornis*?
fossilCenozoicbirdpaleontologyextinct