Join The Fan Lab, a private Fandom research community for users in the US and UK where you will be asked to share your opinions on all things gaming and entertainment! Click here to see if you qualify
Not sure how to contribute here, but you can KO a Pelagornis on water and it will float rather than drowning. I was kiting them to land based on this page, but since my wife showed me it worked we've tamed three or four Pelagornis floating on the surface of a body of water. Megalodon work well as they catch up to the birds quickly and act as a floating platform you can walk around and shoot on.