What evolutionary risk is demonstrated by the specialized nature of *Gastornis*'s highly specific diet?

Answer

High specialization becomes a liability when the environment changes rapidly.

Its disappearance is tied to global climate cooling, which altered the flora, causing its highly specialized adaptation—being a biological nutcracker—to become a liability when its preferred food source vanished.

What evolutionary risk is demonstrated by the specialized nature of *Gastornis*'s highly specific diet?
fossilCenozoicbirdpaleontologyextinct