Quite sorry to well- Break up your info spree, to you whom had much info on the Wonderus Argentavis Magnificence. Much of this was correct, beside the wingspan. The wiki was untrue, as one pterosaur surpassed the 21 feet wingspan of the Argentavis. It was the Quetzalcoatlus Northropi. The Quetzalcoatlus had a wingspan of 33-36 feet. Yes the giant birds you placed turrets on to raid your enemies-The Quetz, Quetzal, Etc. Unless you were speaking about the time period of which the Argentavis lived in, I’m terribly sorry to say the wiki was untrue. I know much about the birds and I’m quite sure the quetzalcoatlus was in fact larger than the Argentavis wingspan. Sorry I wrote so much! I really like dinosaurs!!!