Flea Caravan Guide | Hollow Knight Silksong Wiki

Lost Fleas are special collectibles in Hollow Knight Silksong. Lost Fleas work similarly to Hollow Knight's "Lost Grubs", where players are tasked to find these adorable creatures in various Locations, and help them return to their clan. Hornet first encounters the Flea Caravan, led by Fleamaster Mooshka, in The Marrow — upon finding him, players can speak to him and start a Wish quest, "The Lost Fleas". The initial stage of the Wish requires rescuing five Fleas, but many more are scattered across the kingdom, and finding them all is tied to overall completion progress, as well as unlocking achievements such as “Fleafriend.” This page covers a list of all the Lost Fleas and guides on how to find them. You can also use our Interactive Map to find where all the Lost Fleas are scattered.

 

All Lost Flea Locations Guide in Hollow Knight Silksong

Hollow Knight Silksong Beginner Guide

 

Lost Fleas Guide for Hollow Knight Silksong

The Lost Fleas is one of the wishes in Hollow Knight: Silksong. This will begin once you encounter Fleamaster Mooshka, who is the leader of the Flea Caravan, during your early exploration of The Marrow. Mooshka explains that members of the caravan have gone missing and asks Hornet to track down and free the scattered Fleas that remain trapped in cages throughout Pharloom. This quest transforms what might seem like brief detours into an ongoing collectible hunt, encouraging players to pay close attention to their surroundings, uncover hidden passages, and master platforming challenges in order to reach each Flea.

The initial stage of the Wish requires Hornet to locate and rescue five Fleas, but the quest extends well beyond this introduction since there are dozens of Fleas hidden in different regions of Pharloom, and fully freeing them becomes a recurring objective as you progress further and unlock new areas and abilities. Completing the larger set is directly tied to game completion and is tracked through trophies and achievements, including the “Fleafriend” milestone which is awarded only after every Flea in Pharloom has been rescued. In this way, the Lost Fleas quest acts as both a collectible challenge and a long-term thread of Mooshka’s caravan storyline, blending exploration, platforming, and completionist rewards into a single task.

After recovering the first five Lost Fleas, you'll return to Fleamaster Mooshka at the Flea Caravan to conclude the initial stage of the task. Mooshka praises Hornet’s determination and presents a pivotal choice: she may continue her journey alone, or accept the caravan’s invitation to travel with them. If Hornet chooses to join, the Flea Caravan acts as a fast-travel vessel, carrying her forward into Pharloom and granting access to a later region much earlier than normal progression would allow. This essentially serves as a narrative shortcut for players who want to push ahead quickly.

Declining the offer does not lock you out of the caravan’s storyline. Instead, Mooshka will continue wandering across Pharloom, reappearing in new places as the game unfolds. This design ensures that the Flea Caravan remains part of Hornet’s adventure regardless of player choice, and its rewards will stay available in future encounters.

Should you accept their company, the caravan transports you beyond Greymoor and Halfway Home, unlocking a passage toward the bell-laden city of Bellhart. At this stage, Hornet also earns the Flea Brew, an offensive charm crafted by the caravan’s tiny companions. When consumed, this brew temporarily enhances both movement speed and attack speed, giving players a powerful buff for aggressive combat or tricky platforming challenges.

 

Recommended Route to Find the First Five Lost Fleas in Silksong

For the Quest The Lost Fleas, Hornet will only need to locate the first five and then the quest will conclude and after you'll be able to continue story progression and locate the remaining Lost Fleas in your own time. In some locations you would actually need a specific Ancestral Art unlocked such as Clawline or Cling Grip for example, so here's the recommended route that focuses on the Fleas placed in early-game areas that are reachable without extensive backtracking or the necessity of the late-game upgrades. 

• The Marrow [Silksong Map] - This is a guarantee that you'll start here since this is where you first encounter Fleamaster Mooshka to officially start the quest. 
• Hunter's March [Silksong Map] - Hunter's March is the 2nd and is the area nearest to The Marrow 
• Deep Docks [Silksong Map] - This is the 3rd location and is the location right below Hunter's March
• Deep Docks [Silksong Map] - It is located in the northeast of the first bench that you can find in Deep Docks after passing by The Marrow. You need to use Swift Step to get to reach the Lost Flea.
• Far Fields [Silksong Map] - The last Lost Flea of the initial quest can be found in Far Fields inside a secret room. You'll need to progress down the main vertical shaft of this area until you spot a cracked wall on the right side. Break through it to enter a hidden chamber. Once you free the Flea, prepare for an ambush from a Skarr Scout that spawns in the room. Defeat the enemy, then step closer to the cage so the Flea can escape the scene and count toward your quest.

 

 

Silksong The Marrow Lost Flea

The first Lost Flea can be found in The Marrow after you accept the quest from Fleamaster Mooshka. The map of this area will not be filled in until you have saved, so exploration is key. Begin climbing through a vertical gauntlet filled with enemies and crumbling platforms. Keep moving upward while sticking to the right side until you reach the topmost chamber. Inside you will find a Flea trapped in a cage. Break that cage and walk toward it so the Flea can fly off and will be counted as rescued.

• Location on Interactive Map [Silksong Map]

 

Silksong Hunter's March Lost Flea

The second Lost Flea is located in Hunter’s March  in a vertical section filled with red bud flowers. After defeating the Skarrguard at the entrance, begin bouncing on the red buds to climb upward. You will need to time each jump carefully to avoid the spikes that cover parts of the wall. Continue ascending until you reach the Flea’s cage. Break it open and move toward the Flea so it can fly away and register as a collected lost flea. 

• Location on Interactive Map [Silksong Map]

 

Silksong Deep Docks Lost Flea

Deep Docks

The third Lost Flea is hidden in Deep Docks. Starting from the Bell Beast station, head downward to the west and look for a section of wall that can be broken to reveal a secret passage. The area is dangerous because of falling lava streams that must be carefully timed to avoid damage. The middle stream falls faster than the others, and the left side requires long jumps to cross. Once you reach the chamber, break the cage to release the Flea. When the platform beneath you collapses, it provides a quick route out of the chamber. 

• Location on Interactive Map [Silksong Map]

Deep Docks II

The fourth Lost Flea will be hidden in another area of the Deep Docks. The fourth Lost Flea will be hidden in another area of the Deep Docks. It is located in the northeast of the first bench that you can find in Deep Docks after passing by The Marrow. You need to use Swift Step or Drifter's Cloak to get to reach the Lost Flea.

 

• Location on Interactive Map [Silksong Map]

 

Deep Docks III

There is another Lost flea located in Deep Docks. But you'll have to save this one for later since this Lost Flea requires you to have the Ancestral Art Clawline unlocked already.

Once you see the lava river to the southeast of Deep Docks, jump and use Clawline to the ring chains that you will see there to traverse through them, heading to the left until you can Cling Grip to a wall where you can see bone spikes to its right. Upon seeing the bone spikes, use Clawline or Swift Step to traverse through the bone spikes to the right.

 

You will encounter enemies when you see the furnace after traversing the bone spikes. Defeat the enemies and continue your way up to the left. From there, you have to hit a lever to open a path going up. Continue until you see a path going to the right.

 

At the edge of the path going to the right, after you pass by some Fertids and make a jump to the platform, you will find the Lost Flea. This Lost Flea is the last one you will find in Deep Docks.

• Location on Interactive Map [Silksong Map]

 

Silksong Far Fields Lost Flea

Far Fields

The last Lost Flea of the initial quest can be found in Far Fields inside a secret room. You'll need to progress down the main vertical shaft of this area until you spot a cracked wall on the right side. Break through it to enter a hidden chamber. Once you free the Flea, prepare for an ambush from a Skarr Scout that spawns in the room. Defeat the enemy, then step closer to the cage so the Flea can escape the scene and count toward your quest.

• Location on Interactive Map [Silksong Map]

 

Far Fields II

Another Lost Flea will be located in another area in Far Fields but a Drifter's Cloak and Cling Grip will be needed in order for you to rescue them. This lost flea also will not be tied to The Lost Fleas Quest, meaning you can venture to this anytime in the game. 

• Location on Interactive Map [Silksong Map]

 

Silksong Craw Lake Lost Flea

This Lost Flea is located in Craw Lake. To reach it, make your way toward the upper right of the lake where several narrow platforms are suspended over open space. Tallcraws patrol the area, and small Mite enemies may try to interrupt your jumps, so stay alert and clear them if necessary. Carefully use the platforms to reach the cage and release the Flea. Once freed, walk close enough so it flies away and adds to your progress.

• Location on Interactive Map [Silksong Map]

 

Silksong Greymoor Lost Flea

In Greymoor contains a Lost Flea located and can be rescued at the top of the tower. You'll be able to reach the tower by following the normal Greymoor route and climbing to the topmost level. The Flea sits in a small observation niche there. Break the cage and step close to register the rescue.

• Location on Interactive Map [Silksong Map]

 

Silksong Bellhart Lost Flea

This location isn't tied anymore to the quest The Lost Fleas. But Fleamaster Mooshka mentioned that there are numerous more fleas scattered around the kingdom of Pharloom and one of them will be located in Bellhart. 

Starting from Shellwood, move deeper into the area until you come across a section where several large bell-shaped growths block your path. These bell walls can be broken with a few weapon strikes, revealing a hidden passage that leads directly toward the Bellhart sub-region.

Continue traveling through this passage while keeping to the right side of the path. Before long, you’ll encounter a blue, bell-helmeted creature that patrols the area. This enemy is not only an obstacle but also the key to reaching the Flea. Engage the creature and strike it in midair to use its body as a springboard. Time your attack carefully so that Hornet is launched upward in a double-jump motion, giving you access to the higher ledge above.

Once you’ve landed, cross over to the platform on the left side of this elevated section. Here, you’ll notice a Flea trapped behind a cracked wall. Attack the weakened wall several times until it crumbles away, which frees the caged Flea and allows it to flutter off. Be sure to approach the Flea before leaving the room, as it only registers as rescued once it has flown off-screen.

• Location on Interactive Map [Silksong Map]

 

Silksong Bilewater Lost Flea

Bilewater

This lost flea is located in Bilewater in a hidden area on the far left. It will be in a room behind the Breakable Wall hiding from two Snitchflies. Defeat the two Snitchflies to rescue it. Reminder to approach before leaving as it only registers as rescued once it has flown off-screen.

• Location on Interactive Map [Silksong Map]

 

Bilewater II

The fastest route to this flea is from the Putrified Ducts Bellway Station. Drop down the main column all the way to the base of the room, then head left. Drop down into Bilewater. You'll fall into the big room with the giant bugs that spit goo at you. Drop past the Bilehaven boss-room entrance, and go into the next room on the right. Avoid the traps and the swamp bugs and keep going right until you reach a vertical climb with several traps on way up. There's a secret room at the utmost left corner of the climb that takes you into the room where the flea is.

• Location on Interactive Map [Silksong Map]

 

Exhaust Organ

The Lost Flea that you can find in the Exhaust Organ of Bilewater is located to the northeast of the Exhaust Organ's Bench. From the bench, proceed to the right until you see a rectangular broken iron cage. Upon reaching the iron cage, climb up to the left wall using Cling Grip and continue to reach the top. Note that there is a first platform that you will land on while doing Cling Grip, but that's not the platform you want to continue to. Keep climbing to the left wall using Cling Grip to reach the peak of the wall.

 

Upon reaching the peak of the wall, go to the left until you reach a wall. Use Cling Grip or Drifter's Cloak to go down carefully, because there is a spike trap at the bottom, and find a path to the left. Enter the path and you will end up on a platform with a door that you went from. From the platform, head to the left until you reach the end.

 

Use Swift Step and Cling Grip to traverse the obstacles leading to the edge of the northeast of the Exhaust Organ. You will find the Lost Flea tangled in vines once you reach the edge. Free the Lost Flea by attacking the vines, and it will add to your progress on finding the Lost Fleas.

• Location on Interactive Map [Silksong Map]

 

Silksong Blasted Steps

The Lost Flea in the Blasted Steps can be found perched on a small ledge beside a tall stone pillar within the scorched outer section of the zone. To reach it, you will need the Faydown Cloak, which grants Hornet the ability to perform a second jump in midair.

• Location on Interactive Map [Silksong Map]

 

Silksong Choral Chambers Lost Flea

Choral Chambers

You can find a Lost Flea in the Citadel of Choral Chambers. It is located north of the Citadel Spa Bench. Traverse the east of the Citadel Spa Bench, going to the encircled area in the image. You have to use Cling Grip, Faydown Cloak, Drifter's Cloak, and Swift Step for easy traversal of the obstacles going to that area.

Upon reaching the platform of the encircled area on the map, head straight to the right until you reach the edge of the area. You have to use Swift Step, Drifter's Cloak, and Faydown Cloak to get to the edge easily. You will find the Lost Flea caged once you get there. Free the Lost Flea by destroying the cage, and consider it added to the list of Lost Fleas you found.

 

• Location on Interactive Map [Silksong Map]

 

Choral Chambers II

There is another Lost Flea in the Citadel of Choral Chambers. You can find it in the northwest of the bench of Citadel Spa. Get to the encircled area on the map to start the search for the Lost Flea in the area.

Once you get to the platform of the encircled area, climb to the left wall and find a breakable wall while traversing to the right. Break the wall to create an entrance to find a cog that you will hit to activate the fan. Upon activating, go back outside and traverse to reach a huge platform that has a breakable wall to the right. You have to go above that area to be able to fly to the top, because if you fly there on the spot using your Drifter's Cloak, you will hit a platform that you can't go around.

 

 

Upon reaching the platform that has a breakable wall, break the wall, and from there enter the path that you created and use the Drifter's Cloak to fly up. While you're flying, you will notice the Lost Flea to the right. Approach the Lost Flea to make it fly and progress your search for the Lost Fleas.

 

• Location on Interactive Map [Silksong Map]

 

Silksong Memorium Lost Flea

There's a Huge Lost Flea caged on the top of the Memorium. You can access the area of the Lost Flea in the northeast of the bench of the Memorium. You can start from the area encircled in the image.

Once you reach the area that looks like a swamp, you can traverse up until you find the breakable glass wall to the top-right platform. You need to use Faydown Cloak, Cling Grip, and Swift Step for easy traversal.

 

Enter the path that you created by breaking the glass wall. Use Faydown Cloak, Drifter's Cloak, and Clawline to traverse the path inside the glass wall until you reach the edge. You have to be careful of the lightning mushroom obstacle while traversing the area. Once you reach the edge of the area, you will find a gate lever that is going up. Hit the lever and traverse the area once you go up until you reach the top, where you encounter the caged huge Lost Flea. The huge Lost Flea will fight you, so try to tame it by fighting. Once you tame the Huge Flea, it will return to Fleamaster Mooshka.

 

• Location on Interactive Map [Silksong Map]

 

Silksong Mount Fay Lost Flea

Get to this part of the normal progression of the area, but instead of going down after the tunnel, climb up the wall on your left.

• Location on Interactive Map [Silksong Map]

 

Silksong Sands of Karak Lost Flea

When entering the Sands of Karak from the Blasted Steps entrance near the Bellway, begin by moving to the right. You’ll immediately encounter two short parkour sequences that serve as the initial challenge. Clear both by timing your jumps carefully across the unstable platforms, watching out for loose footing and enemies that may spawn nearby. 

After these first two obstacles, shift your focus upward and slightly left, where you’ll notice a narrow platform guarded by a Coral Furm, the spiky red crab-like enemy that roams the area. If the spiky stone barrier is still intact, you’ll need to strike it repeatedly to break through before you can step onto the platform. Defeat the Coral Furm to prevent it from knocking you into the hazards below, then continue moving left.

Use a dash combined with your harpoon grapple to swing across the gap and latch onto the next ledge. This maneuver will trigger a new series of parkour challenges designed around chained dashes and wall grabs. Follow the platforms leftward, keeping your momentum steady, and climb when the path begins to slope upward. At the top of this sequence, you’ll come to a small alcove where the Lost Flea is trapped. Break the enclosure, then move close enough so the Flea can flutter away, marking it as rescued.

• Location on Interactive Map [Silksong Map]

 

Silksong Shellwood Lost Flea

There is a Lost Flea that you can find in Shellwood. You easily find it when you start at the Bellway of Shellwood. Once you arrive at Shellwood using fast travel, head east until you can drop down to the far right of the area.

 

You can use Faydown Cloak, Drifter's Cloak, and Cling Grip to traverse down to the far bottom-right of the area. Be careful with the flying enemies and white flowers that shoot energy orbs from the wall. As you go down to the far bottom-right, you will notice that the Lost flea is trapped in a vine. Free the Lost Flea by attacking the vines, and you will have progression on your quest to find all the Lost Fleas.

• Location on Interactive Map [Silksong Map]

 

Silksong Sinner's Road Lost Flea

You can find a Lost Flea in Sinner's Road trapped in a cage. To easily find the Lost Flea, start by going to the encircled area on the map. Once you get there, you will see hanging cages. From there, traverse to the down-right.

 

Traversing down-right you will find a one-third broken cage that has a secret path to the right. Enter the path and continue going to the right until you see the Lost Flea's cage. Free the Lost Flea by destroying the cage, but be ready for the two enemies that you will wake upon freeing the Lost Flea.

 

 

• Location on Interactive Map [Silksong Map]

 

Silksong Song Clave Lost Flea

To reach this Lost Flea, begin your descent from Songclave into the Whispering Vaults. Head down to the bottom-right room (next to the Mask Shard area). Climb to the very top of the right wall. There will be a hidden passage heading right. Once in the next room, climb up and head further right. There will be a ring to hook onto. Drop down into the opening below, being mindful of the gears. 

After passing the gears, float down past the spikes. There will be a wall to cling to at the left side with a falling rock overhead. Be careful not to fall past it, as it will drop you into Bilewater. 

Head further left. You will now be below the gears. Simply activate the lever, drop down and free the air current. Ride it up and you'll reach the outside. Once outside, heading further left will lead inside to a closed gate. This will unlock the right-hand passage at the top of Whispering Vaults. Head back right. The exterior section lined with golden spike traps covering the floor. These hazards make the area particularly punishing, so precision platforming is key.

Start working your way forward by hopping across the narrow stone platforms above the spikes. Continue advancing until you are approaching the far-right wall. Just before reaching the wall itself, shift left onto a small platform. From here, perform a sprint jump to launch yourself toward the opposite side, then quickly grapple the wall with your needle to gain purchase.

Climb steadily upward, watching for ledges where you can briefly rest. Higher up, you’ll encounter a series of embedded hooks that serve as anchors for Hornet’s needle. Use these to swing, vault, and chain together a parkour sequence. This section requires good timing, as missing a hook drop means falling back into the spiked area below. After successfully navigating the hook platforms and reaching the top of the route, a Flea will be waiting at the end of the path. Break open its enclosure and step closer so it can flutter free, completing this challenging rescue.

• Location on Interactive Map [Silksong Map]

 

Silksong The Slab Lost Flea

The Slab

There is a Lost Flea that you can find in The Slab. It is located in the west of the northeast bench of The Slab. You can easily access the location of the Lost flea if you haven't opened the gate/bridge that needs Heretic Key. Go to the left until you see a round entrance.

 

Enter the round entrance upon seeing it. From there, you will find the caged Lost Flea. Free the Lost Flea by breaking the cage for it to fly away, and you will have a progression for your quest to find all the Lost Fleas.

 

• Location on Interactive Map [Silksong Map]

 

The Slab II

There is a Lost Flea near the Bellway Bench of The Slab. Go to the bench to the right of the Bellway, use Cling Grip to jump off the left wall up into the hole to the right. Approach the Lost Flea upon seeing, and you will have a progression to your quest to find the Lost Fleas.

 

•  Location on Interactive Map [Silksong Map]

 

Silksong Underworks Lost Flea

You can find a Lost Flea in The Cauldron area of Underworks. It is located in the southwest of the bench of The Cauldron. Go down and be ready with the enemies along the way until you reach a lava floor.

Once you reach the bottom, where you can see a lava floor, go left until you find the platform that you need to jump on. You will find the poor cemented Lost Flea after you jump on the platform. Break the cement to free the Lost Flea. Beware of the exploding bugs; dodge immediately if they get close to you because they will explode.

 

• Location on Interactive Map [Silksong Map]

 

Silksong Whispering Vaults Lost Flea

This Lost Flea in the Whispering Vaults can be found in the northeast of The Stage. It is recommended to get to the area where you will move the cube platform by hitting it. Follow the encircled area in the image below. You have to use Clawline, Cling Grip, Faydown Cloak, and Swift Step to get to the encircled area and traverse to find the Lost Flea.

Once you are in the area with a moving platform, hit the platform on its left side to make it slide to the right. After that, follow the platform by going down to a platform with enemies. You can avoid the enemies by ignoring them and following the moving platform. Use the Faydown Cloak to hit the platform to make it slide up. Follow the platform by landing on the prior platform to the left of the moving platform, then use Faydown Cloak again to reach the right platform. 

 

Once you reach the platform to the right of the starting platform, use Cling Grip on the wall to the right to reach the top of the stationary box platform. Upon reaching the top of the box platform, hit the moving platform on its right side to slide it to the left.

 

Follow the moving platform to the left and jump to the next platform. Upon reaching the platform, hit the moving platform on its south side to make it slide up again. After hitting the moving platform to slide up, follow it using the Cling Grip on the left wall of the current platform you're on. Once you see the moving platform's left side, hit it to make it slide to the right.

 

Use the Faydown Cloak to jump and Clawline to follow the moving platform, and stand on its top. Upon reaching the moving platform, use the Faydown Cloak, then follow up with a Clawline to reach the platform of the Lost Flea.

 

The Lost Flea is caged, so you have to destroy the cage to set it free. Your quest progression will progress once the Lost Flea fly back to Fleamaster Mooshka

• Location on Interactive Map [Silksong Map]

 

Silksong Wisp Thicket Lost Flea

There is a Lost Flea in the Wisp Thicket. Start treading in Greymoor and work your way up to Wisk Thicket to get to this encircled location on the map. Clawline, Faydown Cloak, and Cling Grip are needed to get to the encircled area on the map.

You will know that you are in the encircled location on the map if you are in a place where you can see lots of bamboo trees. Once you get there, head to the top-left to get to a place where you will see moving rusted spiked mechanical obstacles that will block your path. Continue to the left to reach a lever that opens a path going up. Be careful of the mechanical obstacle while trying to get to the lever, because it will take two life points.

 

You can use Clawline and Cling Grip to traverse your way to the lever. Once you get to reach the lever, hit it to go up. You will find the Lost Flea to the left. Free the Lost Flea by breaking the cement that is trapping it.

 

• Location on Interactive Map [Silksong Map]

 

Silksong Wormways Lost Flea

The Lost Flea in Wormways is located in the southeast of the bench. Go to the encircled location on the map to easily find the Lost Flea. You can get there by using Clawline, Drifter's Cloak, Faydown Cloak, and Cling Grip.

Once you get to the encircled location on the map, break the breakable wall to the right. Enter the path that you created and keep heading right until you see the enemy that abducted the Lost Flea. Defeat the enemy to free the Lost Flea.

 

• Location on Interactive Map [Silksong Map]

 

Silksong Putrified Ducts Lost Flea 

The last Lost Flea is located in Putrified Ducts. Vog is the name of the Last Lost Flea. You can find her in the northeast of the Pale Lake in Putrified Ducts, but the Flea Caravan should be stationed in Putrified Ducts to speak to her. If the Lost Caravan is in the Putrified Ducts, go to the encircled area on the map to start finding Vog.

 

Traverse using Clawline, Cling Grip, and Faydown Cloak to get to the encircled area in the map. Once you get to the area, go up to enter the cave. Keep traversing until you get to the peak of Putrified Ducts. Along the way, five vine monsters will pull you up to get to the peak. They are on every edge of the area. The first edge that you need to traverse is going to the right, the second is going to the left, and it alternates until you reach the fifth vine monster. And if ever you hit them with the Clawline, wait for them to hang down their vine for you to pull yourself up. Once the fifth vine monster pulls you up, head to the left to enter the cave where Vog is waiting.

 

Hornet will tell Vog that she already found the other fleas and they are with the caravan already. Vog will tell Hornet that she will return to the caravan now that the fleas are complete.
(note: If you talk to Vog before all other fleas are found, she will go to the caravans current location and sell the remaining flea locations. Once bought, the locations will be marked on your map.)

Return to the Flea Caravan located in Fleatopia of Putrified Ducts to get your rewards from Fleamaster Mooshka. You will obtain the Fleafriend achievement once find all the Lost Fleas.

• Location on Interactive Map [Silksong Map]