Infestation Investigation is one of the first kill quests you run into on Zeplyrian Isle, and it is short enough that the walk there takes longer than the fighting. The targets are low-level bugs floating around open grass, so the only thing that slows most players down is running past spawns without noticing them.
Quick answer: Take Infestation Investigation from Elatrell Featherlight in Thendal Village, kill 8 Pesky Cirrusfly in the grove immediately south, then return to her for 190 experience and 1 silver 10 copper.
Infestation Investigation quest details
| Detail | Value |
|---|---|
| Zone | Zeplyrian Isle |
| Start and end NPC | Elatrell Featherlight <Rangers of Thendal Grove> |
| Turn-in location | Thendal Village |
| Objective | 8 Pesky Cirrusfly slain |
| Kill area | Thendal Grove, south of the village |
| Rewards | 190 experience, 1 silver 10 copper |
| Follow-up | The Cirrusly Queen |
The follow-up quest also shows up as The Cirrusfly Queen in some builds, but it is offered by the same ranger the moment you hand this one in, so you cannot miss it either way.
Where to pick up the quest in Thendal Village
Elatrell Featherlight stands among the tents inside Thendal Village, marked with the usual yellow exclamation point over her head and on the minimap. Thendal Grove is flagged as a sanctuary, so nothing in the camp will bother you while you sort out your quest log.
Open your map after accepting it. The highlighted objective area sits directly below the village on the Zeplyrian Isle map, covering the grassy slope between the camp and the shoreline.
How to kill 8 Pesky Cirrusfly in Thendal Grove
Clearing all eight solo takes roughly two minutes at normal pace, so there is no need to hunt for a specific spawn camp — the whole grove counts.
Group up to share Cirrusfly kill credit
Kill credit is shared across a party here, which matters because this is a starting zone and other players are usually farming the same field. Inviting whoever is nearby means every Cirrusfly the group drops counts for all of you at once.
It also removes the main annoyance of a crowded grove, which is watching someone else tag the bug you were running toward. If nobody is around, the spawns respawn quickly enough that solo clearing is not a problem.
What Pesky Cirrusfly drops
None of the loot is required for the objective, but the corpses are worth looting on the way through since early bag space and vendor copper both matter at this level. Common drops include:
- Cirrusfly Wing
- Torn Insect Wing
- Chopped Cirrusfly Stinger
- Ruined Pelt
- Ragged Leather Gloves
- Bent Large Shield
Turn in the quest and confirm it completed
Once the tracker reads 8/8, run back north uphill and re-enter Thendal Village. Elatrell Featherlight will now have a yellow question mark above her, which is the signal that the objective registered correctly on her end and not just in your log.
Talk to her and complete the quest. You know it worked when Infestation Investigation drops off your tracker, the reward of 190 experience and 1 silver 10 copper lands, and she immediately offers the next step in the chain against the Cirrusfly queen.
Accepting that follow-up right away is the cleanest move, because it sends you back into the same stretch of Thendal Grove you just cleared instead of making you run the hill a third time.
