Rootinest, Tootinest, Shootinest

Kill 5 Rakk in under 10 seconds

Rakks are the creatures that look similar to bats, they will fly in groups of 5. You should find swarms in different areas around the game or during the Rakk Hive fight when it shoots them out of its mouth. Simply shoot them as they swoop down and attack. On the quest "Get the Flock Outta Here" there is a hive near the windmills that you can get a lot to spawn,so watch for that.