Hollow Knight: Silksong Guide – All 30 Lost Flea Locations

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I’m really excited about the Flea-finding quest in Hollow Knight: Silksong! It’s something Hornet asks me to do repeatedly, and it seems like there’s a lot to earn by completing it. Apparently, there are 30 Fleas hidden all over Pharloom, so I’m expecting to do a *lot* of exploring and backtracking to find them all! It sounds like a fun challenge, and I can’t wait to unlock everything.

As a huge Hollow Knight: Silksong fan, I’ve put together this guide to help everyone find all 30 Fleas! It’s a complete list of where to track them all down, so you don’t miss a single one. It’s going to be so helpful!

Bellhart

Right at the top of Bellhart, in the chamber’s upper left corner, you’ll find The Lost Flea. It’s hidden behind a wall that can be destroyed.

Bilewater #1

Starting at the tall silo in Bilewater, head through the passage in the middle of its left side. Continue going left and upwards through the area. You’ll find The Lost Flea hidden behind a wall you can destroy.

Bilewater #2

Starting near the summit of Bilewater, begin at the Bench and move to the right. Within the expansive chamber, circle around to the right and proceed through the swampy area. As you start ascending, head towards the top left to locate the Lost Flea room.

Blasted Steps

The Lost Flea can be found at the very top of the highest silo in Blasted Steps, hidden in a small space. Getting there requires either the Clawline, Cling Grip, Drifter’s Cloak, or Faydown Cloak – the best choice depends on your abilities.

Choral Chambers #1

Okay, so I start at the top left Bench in Choral Chambers and go right into that big, tall shaft. There’s a way down to the Citadel Spa near the bottom, but I ignore that for now and look just *above* it for another opening to the left. I follow that path all the way to the other side of the chamber. Once I’m in this new shaft, I head up and to the right, all the way to the end of the room – that’s where I’ll find the caged Lost Flea. You’ll need the Drifter’s Cloak, Faydown Cloak, and Swift Step to get there.

Choral Chambers #2

From the tall shaft you explored after finding the previous Lost Flea, climb up the left wall about halfway. Look for a breakable section on the right wall. Once you find it, destroy it and turn on the fan. Then, go back to the main shaft and keep climbing until you see another breakable wall on the right side. Use your Drifter’s Cloak to glide on the wind to the next Lost Flea.

Craw Lake

Move upwards, utilizing the balloons, to the top right corner of the Craw Lake chamber to locate this Lost Flea.

Deep Docks #1

Located on the extreme left side of Deep Docks, this area is a bit hidden. You’ll need to start by destroying a wall in the lower-left part of the central silo, which is west of the Bell Beast Station. After that, you’ll be able to reach the Flea by jumping over several lavafalls.

Deep Docks #2

Starting from the Bench at the top left of Deep Docks, go through the passageway to your right. In the very next room, the Lost Flea is located diagonally across from where you entered, in the top right corner. You’ll need either Drifter’s Cloak or Swift Step to reach it.

Deep Docks #3

As a fan exploring the world, I’ve found a cool spot! It’s way over on the extreme right side of Deep Docks, right where it meets Far Fields. Getting there isn’t super easy, though. You’ll need a Simple Key just to get into the area, and then you’ll also need both Clawline and Cling Grip to navigate all the platforming sections. It’s a bit of a challenge, but totally worth it!

Exhaust Organ

Starting from the Bench in the Exhaust Organ, head left and then upwards until you reach the broken cage. Use this cage to climb higher and to the left. Use Cling Grip to reach the top of this wall, then move left again. Carefully drop down to avoid the trap below, and then go left once more. Continue climbing using Cling Grip and Swift Step to locate the tangled Lost Flea.

Far Fields #1

From Pilgrim’s Rest, turn left and cross over to the other side of the main shaft. Then, continue into the next large chamber. From there, go down into a small silo and search for a breakable section on the right wall to find a hidden room containing the Flea.

Far Fields #2

Starting again from the Rest, go in the opposite direction – towards the right this time. Continue past the path going downwards and further to the right to find the second Lost Flea in this area. You will need both Cling Grip and Drifter’s Cloak to reach it.

Greymoor #1

At the very apex of the left tower in Greymoor is a tiny chamber holding the caged Lost Flea.

Greymoor #2

Head right from the apex of the Greymoor lift to find the Lost Flea named Kratt.

Hunter’s March

When you come in through The Marrow, you’ll find this caged Lost Flea along the path to your right, in the upper-right corner of the first room. Walk on the flowers to keep from stepping on the thorns.

Memorium

At the very top of the large, dome-shaped chamber – the highest part of the Memorium. This caged Lost Flea is incredibly large and presents a challenging mini-boss fight on its own.

Mount Fay

In the central area of Mount Fay, when you go through the long tunnel, don’t descend. Instead, use the Cling Grip to stay on the left wall and climb upwards into the ice – you’ll find the Lost Flea there.

Putrified Ducts

You can find a Lost Flea named Vog at the highest point in Putrified Ducts. However, she only appears if the Flea Caravan is also present in Putrified Ducts – this requires collecting and returning 25 Lost Fleas. To reach her, you’ll need to let Hornet get caught by the vines, which will lift her upwards. This also requires you to have the Clawline, Cling Grip, and Faydown Cloak abilities.

Sands of Karak

Starting from the Blasted StepsLost Flea location, head into the Sands of Karak and turn right right away. Use the platforms to climb upwards and to the right until you reach the small alcove where the Lost Flea is trapped.

Shellwood

Starting from the Bellway in Shellwood, turn right and enter the large shaft directly in front of you. Descend, keeping towards the right-hand wall of the shaft. Having a Cling Grip, Drifter’s Cloak or Faydown Cloak will be very useful for reaching the tangled Lost Flea.

Sinner’s Road

You can find this Lost Flea locked up in a room on the right side of Sinner’s Road. Go to the furthest silo on the right, and then follow the right wall, going past the damaged cages, to get to where it is.

Songclave

This secret spot is tucked away in a small recess in the upper-right corner of the large room just to the right of the Songclave. You’ll need both the Clawline and Cling Grip abilities to reach it by jumping between platforms.

The Marrow

Right at the highest point of The Marrows, in the upper-right corner of the room, you’ll find the Flea – you’ll need to do some climbing and maneuvering to get there.

The Slab #1

You’ll find a room on the middle-left side of The Slab. Instead of using the Heretic Key on the lock in that room, cross the bridge. This will lead you to a round entrance that opens to where the caged Lost Flea is located.

The Slab #2

This Lost Flea is located right above the lowest Bench in The Slab. You’ll need both Cling Grip and Faydown Cloak to be able to reach it.

Underworks #1

To the left of The Cauldron, descend to the base of the large silo. Proceed through the passage extending to the left and over the lava flow. The Lost Flea is confined to a tiny alcove at the far end of this challenging passage.

Underworks #2

Okay, so getting to this part of Underworks is a bit tricky. You can *only* get there through Wisp Thicket. Once I hit the Bench there, I went left and crossed the passage over to Greymoor. Then, in the next big room, I headed upwards and kept going left – that’s the way to the exit to Underworks. There’s a mechanism you can use to get up to the chamber where the Lost Flea is trapped. Just a heads-up, you’ll definitely need both Clawline and Cling Grip to make it! It’s a tough climb without those.

Whispering Vaults

Starting from The Stage, head to the right in the direction of the main silo. Then, take the passageway directly above the one you initially came out of, heading back to the left. Inside this large chamber, the Lost Flea is located in the top right corner. However, you’ll first need to go to the top left and move around towards it. Successfully navigating the platforms requires you to have Clawline, Cling Grip, Faydown Cloak, and Swift Step.

Wormways

Okay, so as a big fan, let me tell you how to find the Lost Flea! If you go to the bottom of that really tall silo on the right side of Wormways, you’ll see a wall that you can actually destroy. Blast through it and head further to the right. Once you’re in that chamber, you’ll find a creature that’s holding the Lost Flea captive. You gotta rescue it!

Rescuing your first five fleas will finish the Wish and start the Flea Caravan’s trip to Greymoor, with Hornet joining them. If you save a total of 15 fleas, you’ll get the “Flea Finder” trophy/achievement and the caravan will head to Blasted Steps. Freeing 25 fleas will send them onward to Putrified Ducts.

Collecting all 30 Lost Fleas will unlock the “Fleafriend” trophy/achievement. You’ll also receive the Egg of Flealia from Fleamaster Mooshka. This egg lowers the Silk cost of using Silk Skills, but the benefit only applies when your health is full.

Those are the locations of all 30 Lost Fleas to be found in Hollow Knight: Silksong.

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2025-10-01 12:17