So here's a very good tip for newbies in ARK swamps.

If hunting, target the Boa first. Make sure you kill them!

Here's why. About the Boas, they have a good poison. They might knock out someone with just 2-3 bites. Not so deadly, but when you're asleep, other predators might kill you. You don't wake up quickly. Bring a good pet and some stimulant. You might need a ranged weapon too.

Boa= Titanoboa