Kill Lord Klaq and return to Windcaller Blackhoof at the Cenarion Refuge.
In your travels, you might have encountered some of the expedition's watchers. They do the majority of the field work: documenting the unique inhabitants of the marsh, collecting samples, and making contact with sentient species.
The safety of the watchers is paramount, [class]. We've had to recall the watchers we sent to explore Funggor Cavern to the south, because of marshbeast attacks. Warden Hamoot believes that killing their leader, Lord Klaq, will bring a swift end to the attacks.