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For an overview of bloatflies in the Fallout series of games, see bloatfly.

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


This section is transcluded from Bloatfly. To change it, please edit the transcluded page.

An impressive example of the mutations caused by the Great War, the bloatfly is an evolution of the Tabanus genera of biting horse fly. Tentatively classified as part of the Tabanidae family in the order Diptera, class Insecta, phylum Arthropoda, and kingdom Animalia, it is a major divergence from its evolutionary forebears.[1]



This section is transcluded from Bloatfly. To change it, please edit the transcluded page.

The standard bloatfly is covered in a green and brown carapace, it is significantly larger and more tenacious than its predecessor the horse fly. Although its size inhibits its flight characteristics and agility, making it impossible to feed like pre-War horse flies did. Instead, it uses its engorged stinger and pupae gestating within its abdomen to incapacitate prey. The stinger is capable of launching mature larvae with a barbed sting at the end. These latch onto the target and deliver a neurotoxin capable of incapacitating larger prey, allowing the bloatfly and its larvae to feed. Its neurotoxin is ineffective against humans and larger targets, with localized necrosis being the only larger complication. As a result, the bloatfly is frequently prey, rather than predator, particularly among wastelanders who learned how to prepare its meat (or can stomach eating it raw).[1] Some are noted to explode upon death.[2] Bloatflies can resort to scavenging in situations where prey or other sources of food are scarce.[3]

Game attributesEdit

Individually, they do not inflict much damage, but in swarms, bloatflies can be a moderate threat to low-level player characters (especially companions). Their carapaces are not particularly effective as a protection against any type of weapon. However, due to their fast, erratic movement and small size, compared to other denizens of the wastes, bloatflies are a challenge to shoot without V.A.T.S.. They have a slow speed of pursuit, making it easy to escape them even with low Agility.




Bloatflies are enormous blowflies. In significant numbers they pose a minor threat to high-level player characters, but can prove lethal to those at a low-level.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Icon level
Icon XP
Icon eye
Icon heart
Icon shield silver
Icon fist
Very aggressive: Will attack enemies and neutrals on sight.Icon requiredIcon requiredIcon optional
Icon confidence
Average: Will avoid/flee from threats stronger than itself.Icon requiredIcon requiredIcon optionalIcon optional
Icon group
Helps nobody: Will not help anyone.Icon optionalIcon optional
Icon attack
Larva spit (5 Icon damage)


A large group of bloatflies can be found throughout the entrance area of Vault 92. Two other significant locations are northeast of Reclining Groves Resort Homes, where they feed off the corpses of some dead wastelanders, and between Fort Independence and Fairfax ruins, on the hillside near a collapsed overpass highway.


  • These creatures are found throughout the wasteland but they are most commonly found in areas nearest to where barrels of toxic material seeps into the soil.
  • A bloatfly's wing makes a faint clicking noise, similar to a giant ant's movement, but fainter.
  • 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.
  • On death, they make a high-pitched chattering noise.
  • The Enclave outpost near Megaton has been studying these and other creatures native to the region.
  • In a piece of concept art by Adam Adamowicz, the bloatfly is referred to as a "shrieking blowfly."
  • The Lone Wanderer can shoot and cripple a bloatfly's brain (located between their eyes), which will frenzy it. However, this will typically result in the creature's death.


Bloatfly attack


Bloatflies appear only in Fallout 3.



  1. 1.0 1.1 Enclave field research terminal entries; Enclave field research terminal, Field Entry: "Bloatfly"
  2. Fallout 4 loading screen hints: "One of the Wasteland's most disgusting creatures, the Bloatfly shoots its maggots as projectiles, and often explodes upon death."
  3. Cassidy Caravans wreckage
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