To battle and escape one of these, you can bola it then kill it with long range weapons, don’t worry this still works when your in its jaws. But it can jump while in a bola. Same for taming but with tranqs instead of arrows or bullets.
For all the noobs out there, if these things kidnap you in the swamp, here’s what to do. Take out your bow/ gun. Pray you have ammo and fire right into its head. This strategy has saved me countless times.
P.S. If you have a strong melee weapon such as a pike or sword on you, that also works.