Those spawners in the swamp in the open by big rocks are typically three.
Two drauger spawners and one skeleton spawner.

You really don't want to charge in there especially early on before you gear up and food up from the swamp assets.

Best to keep an eye out for them and destroy them with a bow from a distance. You can actually destroy the spawner far enough away to not trigger any spawns. The last thing you want to get spawned is a two star drauger archer. Those are just nasty!

Good luck!