So everybody is aware that sometimes something will attack the argy and if you have the argy in neutral, they'll take it on, sucks when your set up near the mountain and a wild argy attacks because you got too close or vice versa, so you see them in the sky fighting, your argy wins, now it's stuck in the air and not landing when you call it. Use a spyglass to look at him then command him to follow, this can work on any game that's yours. Argys are just the worst though.
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!