From Lotro-Wiki.com

Lore

With the passing of Black Riders from the East, the disease-bearing sickle-flies of the Midgewater Marshes have begun to breed more rapidly, threatening to spread contagion among inhabitants of Bree-land. You are tasked with ending the threat of sickle-flies' plague.

People may snicker, but how many of them had to fight one of those giant bloodsuckers?

Objective

Defeat 30 sickle-flies in Bree-land

Reward

Title: Fly-swatter