Fly

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Fly
Entity image

Base HPStage HP
3
0
Table dividing line 1.png
Entity ID
13.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Downpour.pngStage Dross icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage Mausoleum icon.pngStage Gehenna icon.png
Stage Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Cathedral icon.png
Treasure Room Icon.pngShop Icon.pngSecret Room Icon.pngSuper Secret Room Icon.pngSuper Secret Room Icon.pngSuper Secret Room Icon.pngBedroom Icon.pngBedroom2 Icon.png
Disambig.png This article is about the fly enemies. For other uses, see Fly (Disambiguation).

Flies are enemies that buzz around the room randomly. They cannot damage Isaac at all, even by touch, making them completely harmless. However, they can turn into Pooters if they fly around Poop for too long, or come in contact with a Golden Poop.

Along with monsters like the Gapers and Spiders, Flies are one of the most commonly-encountered monsters and comes with numerous different types.

Variants[edit | edit source]

Attack Fly[edit | edit source]

Attack   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
18.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage Womb icon.pngStage Scarred Womb icon.png
Stage Chest icon.png
Challenge Room Icon.pngSuper Secret Room Icon.pngVault Icon.pngSuper Secret Room Icon.pngTreasure Room Icon.png

Attack Flies are red and black flashing flies that will follow Isaac relentlessly until killed. Their only way of damaging Isaac is by contact, and they move rather slowly, making them easy to kill. However, they can be dangerous when found in groups, as they can swarm around Isaac quickly.

Attack Flies turn into regular Flies if Isaac has 15►Skatole Skatole. However, they take a small amount of time to convert into Flies, so it is possible for Isaac to be damaged if the player is not careful.

Notes[edit | edit source]

  • The Duke of Flies can spawn larger versions of Attack Flies that have 10 Base HP.
  • Gurdy can spawn weaker versions of Attack Flies that only have 3 HP.

Ring Fly[edit | edit source]

Ring   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
222.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
(Rarely)

Ring Flies are a new addition to Rebirth. They are pink flies that, upon entering the room, will cluster together into a circular formation and orbit rapidly while moving towards Isaac. They will hold formation even when you destroy all but one fly. The maximum amount of flies per formation is 10. These flies are fast and take up a large amount of space, so it may be recommended to hold these on higher danger priority.

  • Ring Flies are not affected by 15►Strange Attractor Strange Attractor and will continue to stay within their current circular formation.

Moter[edit | edit source]

Moter
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
80.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png

Moters appear as two conjoined Attack Flies. They behave similarly to regular Attack Flies but split into two Attack Flies upon being killed. Their split is very wide and unpredictable and can easily shave off half a heart. It is recommended to kill faster flies and other small monsters before it, as the two flies it spawns are more dangerous in many ways. Running between them just as they split is also a very good way to dodge.

  • If Isaac has 15►Skatole Skatole or uses a bomb, killing a Moter will not make them split into two Attack Flies.

Eternal Fly[edit | edit source]

Eternal   Fly
Entity image

Base HPStage HP
NN
Table dividing line 1.png
Entity ID
96.0
Table dividing line 2.png
Found In
All Chapters
Treasure Room Icon.pngSecret Room Icon.pngVault Icon.pngSuper Secret Room Icon.png

The Eternal Fly is a white-colored fly that can be found on any floor in the game. They usually circle Corny Poop or enemies like Holy Leeches and Hangers, and will not stop circling them until their hosts are destroyed. Before that, they will deal damage to Isaac if he touches them, and they're completely immune to all forms of damage. When their hosts are destroyed, they convert into Attack Flies.

  • If Eternal Flies are circling Corny Poop and there are no other enemies around, you can leave the room at will. This is true even if they have already been converted into Attack Flies: they will simply disappear when you return into the room.

Notes[edit | edit source]

Dart Fly[edit | edit source]

Dart   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
256.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Super Secret Room Icon.pngDice Room Icon.png
Added in Afterbirth

Dart Flies are similar to regular Attack Flies, but attempt to mimic Isaac's movements. Their only way of damaging Isaac is by contact, and they can move fairly quickly, making them potentially dangerous when found in groups.

Swarm Fly[edit | edit source]

Swarm   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
281.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Cellar icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage Caves icon.pngStage Catacombs icon.pngStage Flooded Caves icon.png
Added in Afterbirth

Swarm Flies are similar to regular Attack Flies but appear in tightly-packed clusters. Their only way of damaging Isaac is by contact, and although they move fairly slowly, they can be dangerous by simply outnumbering Isaac.

Notes[edit | edit source]

  • If a Swarm Fly is separated from its group due to being petrified, it quickly moves back to its group once unpetrified.

Hush Fly[edit | edit source]

Hush   Fly
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
296.0
Table dividing line 2.png
Found In
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
???
Added in Afterbirth

Hush Flies are mainly spawned by Hush and behave somewhat similar to Ring Flies, flying towards Isaac in certain patterns. Unlike Ring Flies, they can form other shapes such as polygons and can also orbit Hush.

Hush Flies have a brief period of invincibility when Hush spawns them, making them appear to have more health than they have.

Hush Flies are not affected by the Beelzebub Transformation.

Added in Afterbirth † Hush Flies can also rarely spawn outside of the Hush fight in rooms.

Army Fly[edit | edit source]

Army   Fly
Entity image

Base HPStage HP
5
0
Table dividing line 1.png
Entity ID
868.0
Table dividing line 2.png
Found In
Stage Basement icon.pngStage Burning Basement icon.png
Stage Dross icon.png
Stage Caves icon.png
Stage Depths icon.png
Stage Corpse icon.png
Added in Repentance

Army Flies are flies introduced in The Binding of Isaac: Repentance. They are green flies that chase Isaac, moving in the cardinal directions as they do so. If there are other Army Flies in the room, they will form a single file line while chasing Isaac.

Willo[edit | edit source]

Willo
Entity image

Base HPStage HP
6
0
Table dividing line 1.png
Entity ID
868.1
Table dividing line 2.png
Found In
Stage Downpour.png
Stage Flooded Caves icon.png
Added in Repentance

The Willo is a fly introduced in The Binding of Isaac: Repentance.

Willos circle around Isaac, moving with him perfectly, and firing shots inwards towards him. They circle quite quickly, and can be hard to hit.

Despite the seemingly unfair tactics they use, their shots are very easily avoidable by simply staying mobile, as their shots do not inherit momentum and will usually miss Isaac as long as he keeps on the move.

It's entirely viable to ignore them at first, simply moving in a small circle to dodge their attacks while dealing with other enemies first.

They also take damage from fireplaces, so it's a good idea to position Isaac such that their orbit overlaps one.

Ultra Famine Fly[edit | edit source]

Ultra   Famine   Fly
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
951.11
Table dividing line 2.png
Found In
Stage Home icon.png
Spawned exclusively by Ultra Famine.
Added in Repentance

Ultra Famine Flies are flies spawned by Ultra Famine, that charge at Isaac on a delay.

Ultra Pestilence Fly[edit | edit source]

Ultra   Pestilence   Fly
Entity image

Base HPStage HP
10
0
Table dividing line 1.png
Entity ID
951.21
Table dividing line 2.png
Found In
Stage Home icon.png
Spawned exclusively by Ultra Pestilence.
Added in Repentance

Ultra Pestilence Flies are flies spawned by Ultra Pestilence, that swarm around him blocking shots and dealing contact damage. They also can be shot at Isaac in a ball-like form in his 2nd phase.

Gallery[edit | edit source]

Trivia[edit | edit source]

  • The Black Fly has the lowest health of any enemy in the game, tied with the Added in AfterbirthCorn and Added in RepentanceDrip.
  • Eternal Flies were first added to the Wrath of the Lamb DLC for the original Binding of Isaac game.
  • There is a fly enemy (popularly known as the Ball of Flies) in the Eternal Edition of the original The Binding of Isaac that is a ball of 4 Attack Flies, resembling 2 Moters stuck to each other. This enemy does not appear in Rebirth, likely due to being added in said Eternal Edition update that was added a while after the release of Rebirth.
  • In a Q&A Reddit thread by Edmund McMillen, Edmund confirmed that the species of flies in The Binding of Isaac are house flies and botflies.[1]

References[edit | edit source]


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