Fallout: New Vegas Creatures

Arthropods

 * Cazador
 * Young cazador
 * Legendary cazador
 * Bloatfly
 * Giant ant
 * Mantis
 * Giant mantis nymph
 * Radscorpions
 * Bark scorpion
 * Bark scorpion Hunter
 * Giant radscorpion
 * Small Radscorpion
 * Radscorpion Queen

Humanoid

 * Ghouls
 * Feral ghoul
 * Glowing One
 * Feral ghoul reaver
 * Feral ghoul roamer
 * Ghoulified NCR Troopers
 * Humans
 * Super mutants
 * Nightkin

Non-humanoid

 * Bighorner
 * Bighorner calf
 * Bighorner bull
 * Brahmin
 * Centaur
 * Evolved centaur
 * Coyote
 * Coyote Den Mother
 * Dog
 * Cyberdog
 * Legion mongrel
 * Giant rat
 * Rodent of unusual size
 * Mole rat

Plant creatures

 * Spore plant

Human-plant hybrids

 * Spore carrier
 * Spore carrier savage
 * Spore carrier brute
 * Spore carrier fledgling

Reptiles

 * Deathclaw
 * Deathclaw baby (Fallout: New Vegas)
 * Young Deathclaw
 * Deathclaw alpha
 * Deathclaw mother (Fallout: New Vegas)
 * Gecko (Considered animal for Animal Friend and Animal Control.)
 * Fire gecko
 * Golden gecko
 * Little gecko
 * Mirelurk king
 * Lakelurk

Unknown

 * Nightstalkers
 * Legendary night stalker