Bloatfly (Fallout 3)

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Icon disambig.svg
For an overview of bloatflies throughout the Fallout series, see Bloatfly.
LocationCapital Wasteland

Bloatflies are mutated insects living in the Capital Wasteland in 2277.


From Enclave Field Reaserch terminal entries,


Kingdom: Animalia
 Phylum: Arthropoda
 Class: Insecta
 Order: Diptera
 Family: Tabanidae
 Genus: Tabanus Linnaeus
 Field observation suggests that the bloatfly is a mutation of the Tabanus horse fly with provocative advances. These evolutionary forebears possessed neither the significant body mass, nor projectile sting of the bloatfly. Dissection has revealed that this stinger is engorged with living pupae and neurotoxins. These projectiles are capable of incapacitating large prey on which the bloatfly and it's gestating young can freely feed. These neurotoxins are only nominally effective on humans, but can cause localized necrosis at the wound site. This observation is contrary to earlier assumptions that the bloatfly was primarily a scavenger. The bloatfly can be dispatched easily with light weapons, but nonetheless present a threat to field operatives, especially when encountered in numbers. They are hostile and can strike before the target is aware of its presence.



Bloatflies attack at long range by shooting their prey with spine-bedecked larva launched from its abdomen. This supply of larva is seemingly inexhaustible, and unless evaded or eliminated, bloatflies will persecute an attacker relentlessly. They are covered in a green-brown carapace. Bloatflies typically live in small groups of two to four individuals but can be encountered on their own.

Game attributes

Individually, they do not inflict much damage, but in swarms, bloatflies can be a moderate threat to low level players and deadly to weak companions.

Their carapaces are not particularly effective when trying to protect against any type of weapon, thus they are easy to kill, assuming you can hit them. Due to their erratic movements, bloatflies can be challenging to hit at times.


Name (Base ID)StatisticsBehaviorAbilitiesItems
LevelIcon level.png
Experience pointsIcon XP.png
DetectionIcon eye.png
Health pointsIcon heart.png
Damage resistanceIcon shield silver.png
FistIcon fist.png
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
ConfidenceIcon confidence.png
Average: Will avoid/flee from threats stronger than itself.Icon required.pngIcon required.pngIcon optional.pngIcon optional.png
GroupIcon group.png
Helps nobody: Will not help anyone.Icon optional.pngIcon optional.png
AttackIcon attack.png
Larva Spit (5 DamageIcon damage.png)


  • A bloatfly's wings makes a faint clicking noise, a bit like a giant ant's movement, but fainter.
  • Bloatflies, when they do not see you, seem to do circles in the air then stop, making it somewhat easier for the player to target them outside of V.A.T.S.
  • Bloatflies are one of the weakest creatures to come across in the wasteland, on par with radroaches for being the weakest enemies in the game. In fact, they're probably the first creatures the Lone Wanderer will meet outside Vault 101.
  • Yao guai are for the most part non-hostile toward bloatflies. The reason behind this is unknown.
  • The Enclave outpost near Megaton has been studying these and other creatures native to the region.


The bloatfly appears in Fallout 3.