Due to the new tlc phase 2 that came out march 2018, the argy has a new saddle with a smithy, reduced weight capabilities and can hold two dinos at once (small dino in beak, normal sized in talons) but you can no longer carry procroptodons or castoroides but you can now carry thylacs. It also has a rapid health regen when eating meat
Getting a massive TLC update in March 2018. The saddle will act as a mobile smithy, Argentavis will be able to carry with Talons as well as with its beak, reduced carry weight on obsidian and a few other unannounced resources (similar to the mammoth and wood), and will also gain a Rapid HP Regen upon eating (likely from devouring corpses and not specifically food from inventory). Like so people can see!