Fallout 3 creatures

General information
All Fallout 3 creatures, when in the proximity of others, will fight each other as long as they are not in the same faction as grouped below. For example, deathclaws will attack mirelurks, but feral ghouls will not attack glowing ghouls. Deathclaws and mirelurks aren't affected by the Animal Friend perk, as they are both considered abominations. Feral ghouls will be friendly to a character with the ghoul mask equipped.

Humanoid

 * Ghoul
 * Feral ghoul
 * Reaver
 * Roamer
 * Glowing one
 * Swamp ghoul
 * Notable
 * Mr. Keller
 * Meat
 * Ethyl
 * Samuel
 * Stefan
 * Sun of Atom
 * Atom's Champion
 * Mother Curie III (potential)
 * Humans
 * Super mutants
 * Behemoth
 * Brute
 * Master
 * Overlord
 * Notable
 * Fawkes
 * Uncle Leo
 * Swampfolk
 * Scrappers
 * Brawlers
 * Creepers
 * Trackers
 * Bruisers
 * Trogs
 * Trog fledgling
 * Trog brute
 * Trog savage
 * Notable
 * Billy

Non-humanoid

 * Brahmin
 * Mad brahmin
 * Centaur
 * Notable
 * Clancy
 * Dog
 * Guard dog
 * Raider guard dog
 * Scavenger's dog
 * Talon Company guard dog
 * Vicious dog
 * Notable
 * Dogmeat
 * Four Score
 * Ginger
 * Hooligan
 * Bandit
 * Pete
 * Rex
 * Muttface
 * Muffy McClellan
 * Freki
 * Geri


 * Mole rat
 * Notable
 * Pumpkin
 * Yao guai


 * Scavenger's yao guai
 * Notable
 * Ruzka

Reptiles

 * Deathclaw
 * Enclave deathclaw

Birds

 * Bird

Arthropods

 * Bloatfly
 * Fire ant
 * Fire ant worker
 * Fire ant soldier
 * Fire ant warrior
 * Fire ant nest guardian
 * Marigold ant queen
 * Giant ant
 * Giant worker ant
 * Giant soldier ant
 * Giant ant queen
 * Invader ant
 * Mutated forager ant
 * Mirelurk
 * Mirelurk hunter
 * Nukalurk
 * Mirelurk king
 * Swamplurk queen
 * Swamplurk
 * Radroach
 * Notable
 * Fluffy
 * Jitters
 * Radscorpion
 * Giant radscorpion
 * Albino radscorpion

Extraterrestrials

 * Abomination
 * Alien
 * Alien worker
 * Alien captain