The bleached skull of an Argentavis pulled "from the mires of extinction" was used by the Faction Paradox member Father as his ceremonial mask. To match, his spouse, Mother, wore a mask made from the "weather-beaten" skull of a Haast's eagle. (PROSE: Going Once, Going Twice)
Behind the scenes[[edit] | [edit source]]
In the real world, the Giant Teratorn (Argentavis magnificens) is believed to have been among the largest flying birds in Earth's history, like the Haast's eagle.