Fallout 4 Creatures

General information
Creatures are monsters and humans encountered in The Commonwealth and surrounding areas, for machines and robots, see Fallout 4 robots and computers

Legendary enemies
Most creature types have a chance to spawn as a Legendary variant, as well as tiered named variants leading up to the Legendary creature. A legendary creature will always drop weapons or armor with unique modifiers (displayed on the Pip Boy with a star), for more information on these modification see Legendary effects. Sometimes different weapons with the same unique modifier as another weapon can be found, though this doesn't happen often.

In combat legendary creatures are very powerful. What kind of enemy type they are seems to be random but they seem to spawn at a leveled enemy type with some chances of them being a lower level enemy. When a legendary enemy loses half their health they will mutate and regain that health and gain buffs making them harder to kill.

The chance of a creature spawning as Legendary varies based on difficulty. The default difficulty is Normal.

Humanoid
Synths
 * Ghoul
 * Feral ghoul
 * Feral ghoul roamer
 * Feral ghoul stalker
 * Feral ghoul reaver
 * Withered feral ghoul
 * Gangerous feral ghoul
 * Rotting feral ghoul
 * Charred feral ghoul
 * Glowing one
 * Putrid glowing one
 * Bloated glowing one
 * Human
 * Raiders
 * Raiders (Fallout 4)
 * Triggermen
 * Super mutant
 * Skirmisher
 * Enforcer
 * Master
 * Brute
 * Butcher
 * Behemoth
 * Overlord
 * Primus
 * Warlord

Non-humanoid

 * Dog
 * Brahmin
 * Mole rat
 * Mole rat brood mother
 * Mole rat queen
 * Mongrel
 * Mutant hound
 * Radstag
 * Yao guai
 * House cat
 * Emmett
 * Ashes
 * Sea creature

Reptiles

 * Deathclaw
 * Chameleon deathclaw
 * Alpha male deathclaw
 * Mythic deathclaw
 * Albino deathclaw
 * Glowing deathclaw

Arthropods

 * Bloatfly
 * Black bloatfly
 * Festering bloatfly
 * Glowing bloatfly
 * Bloodbug
 * Red widow bloodbug
 * Vampiric bloodbug
 * Mirelurk
 * Softshell mirelurk
 * Mirelurk hatchling
 * Mirelurk killclaw
 * Mirelurk razorclaw
 * Mirelurk hunter
 * Glowing Mirelurk
 * Mirelurk queen
 * Mirelurk king
 * Stingwing
 * Radroach
 * Radscorpion

Aliens

 * Alien

Birds

 * Raven
 * Seagull