Thin wings hide a highly volatile belly. Will give its own life to protect its territory.

An angry creature with no regard for its own life. A creature without fear... can it truly be called "prey"?

Dialogue Bottom

Belflies are enemies in Hollow Knight. They are quick, highly volatile flying creatures who dive at prey with no sense of self-preservation.[1][2]

Behaviour and Tactics

It hangs from a ceiling, emitting a high-pitched squeak. Listen carefully for this sound as it is usually found in dark or secluded places, where spotting it usually means that it's too late to avoid contact with it.

Upon seeing the Knight, it emits a louder shriek, exposes its glowing belly, then swoops down on the Knight, exploding on contact and dealing two masks of damage.

Its homing is limited to a wide arc about 90 degrees below it, after which it will continue in an arc until making contact with the environment or the Knight. Dodge away when it dives in and let it explode against the surface it impacts. The blast also instantly kills any enemy in its area of effect.

It is possible to kill it before it dives as it dies in one hit even with the un-upgraded Nail; however, timing this is difficult. Spells, Nail Arts, and Grubberfly's Elegy can be used to dispose of it from a distance.

Lifeblood Icon If a Belfly kills itself, it still will count towards its entry in the Hunter's Journal.

Dream Nail Dialogue Essence
  • ...Light...Danger...
  • ...Safe...Dark...
  • ...Hungry...Hungry...
  • ...Scared...
  • ...Kill...Hurt...
  • ...Away. Away...
  • ...Pain...
  • ...Eat...When...


They can be found mainly in the Royal Waterways and Kingdom's Edge; however, they can also be spotted in smaller numbers throughout the City of Tears and in the north part of Ancient Basin.



  • It can be pushed back from the Knight to avoid damage by using the Dream Nail.
  • Its shell will not drop if it is killed before it reaches the ground.


  1. Wanderer's Journal, p. 73.
  2. Belfly Hunter's Journal entry: "An angry creature with no regard for its own life."
Compendium Broken Vessel Idle
Main Game CrawlidVengeflyVengefly KingGruzzerGruz MotherTiktikAspid HunterAspid MotherAspid HatchlingGoamWandering HuskHusk HornheadLeaping HuskHusk BullyHusk WarriorHusk GuardEntombed HuskFalse KnightMaggotMenderbugLifeseedBaldurElder Baldur
MosscreepMossflyMosskinVolatile MosskinFool EaterSquitObbleGulkaMaskflyMoss ChargerMassive Moss ChargerMoss KnightMossy VagabondDurandooDurandaAluba
Charged LumaflyUomaOomaUumuu
AmbloomFunglingFungoonSporgFungified HuskShrumelingShrumal WarriorShrumal OgreMantis YouthMantis WarriorMantis Lords
Husk SentryHeavy SentryWinged SentryLance SentryMistakeFollySoul TwisterSoul WarriorSoul MasterHusk DandyCowardly HuskGluttonous HuskGorgeous HuskGreat Husk SentryWatcher KnightThe Collector
BelflyPilflipHwurmpBluggsacDung DefenderFlukefeyFlukemonFlukemarm
ShardmiteGlimbackCrystal HunterCrystal CrawlerHusk MinerCrystallised HuskCrystal Guardian
Furious VengeflyVolatile GruzzerViolent HuskSlobbering Husk
DirtcarverCarver HatcherGarpedeCorpse CreeperDeeplingDeephunterLittle WeaverStalking DevoutNosk
Shadow CreeperLesser MawlekMawlurkBrooding MawlekLightseedInfected BalloonBroken Vessel
BooflyPrimal AspidHopperGreat HopperGrub MimicHivelingHive SoldierHive GuardianHusk Hive
Spiny HuskLoodleMantis PetraMantis TraitorTraitor Lord
Sharp BaldurArmoured SquitBattle ObbleOblobblesShielded FoolSturdy FoolWinged FoolHeavy FoolDeath LoodleVolt TwisterZote the MightyGod Tamer
XeroGorbElder HuMarmuNo EyesGalienMarkoth
WingmouldRoyal RetainerKingsmouldSiblingVoid Tendrils

HornetThe Hollow KnightThe RadianceShadeHunter's Mark

Hidden Dreams Icon Hidden Dreams
Grey Prince ZoteWinged ZotelingHopping ZotelingVolatile ZotelingWhite Defender
Grimm Troupe Icon The Grimm Troupe
Grimmkin NoviceGrimmkin MasterGrimmkin NightmareGrimmNightmare King GrimmSeal of Binding
Lifeblood Icon Lifeblood
Hive Knight
Godmaster Icon Godmaster
FlukemungaPale LurkerBrothers Oro & MatoPaintmaster SheoGreat Nailsage SlyPure VesselVoid IdolWeathered Mask
Community content is available under CC-BY-SA unless otherwise noted.