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• Mobs have a doubled "follow range" (but not "aggro range")
• Mobs that have a flee entity goal don't flee if the entity has less than half health
• Most hostile mobs are now hostile to villagers
• Mobs riding others path find with the accumulated dimension to avoid going through blocks

Arthropods General

• Don't get fall damage
• Larvae spawn with a bonus speed depending on local difficulty

Cave spider

• Cave spider can spawn naturally in caves, the deeper the more common
• Cave spider jockey has a slight chance to spawn

Silverfish

• Infested stone can be everywhere, not only under mountains

Skeletons General

• Runs away from the player
• Knows a bit how to swim

Skeleton

• Can spawn with spectral arrows

Stray

• Shoots freezing arrows
• Can spawn in any cold biome

Wither skeleton

• Can spawn holding a bow if adult, so they will shoot flame arrows
• Carry an iron sword instead of a stone one

Skeleton horse

• Spawn different kind of horsemen
• One is a regular Skeleton with spectral arrows
• One is a Stray
• One is a Bogged
• One is a Wither Skeleton holding a bow
• Moves faster when ridden by mobs

Undead General

• Steals life on attack
• Ignore other undead mob attacks

Phantom

• Can target and fly through blocks
• Is repelled by light (luminance level 10 or higher)
• Can spawn in End Cities

Zombies General

• Has a better knockback resistance
• Is more likely to call reinforcement
• Can call reinforcement of the same Zombie type
• Can spawn with attributes variations when adults
• Caller have a call reinforcement bonus
• Runner have a speed bonus
• Tank have a health bonus
• Unstoppable have a knockback resistance bonus
• Baby zombies can spawn on top of each other

Husk

• Is no longer affected by fire damages

Drowned

• Spawns more often with a trident as in Bedrock
• Increased velocity in water
• Baby drowned can spawn riding a guardian

Zombified Piglin

• Has a slight chance to spawn in a "brute" variant
• Holds a golden axe instead of a golden sword
• Targets players on collision

Zombie horse

• A Zombie Horse trap can spawn when it thunders
• One is a Zombie with an iron sword
• One is a Zombie Villager with an iron axe (and a guaranteed diamond chestplate)
• One is a Husk with an iron shovel
• One is a Drowned with a trident
• Moves faster when ridden by mobs

Pillager

• Can spawn as a Pillatrooper
• Can fly up in the air with a firework rocket
• Shoot quicker valve of arrows when airborne
• First shot guaranteed to be a firework rocket, with a chance to continue
• Increased chance for piercing enchantment on their crossbow

Evoker

• Immune to arrows
• Has more health

Illusioner

• Can spawn in Mansions

Vindicator

• Can have a speed bonus depending on local difficulty
• Can spawn in patrols

Ravager

• Can spawn in patrols, with a pillager riding it or not

Witch

• Flees the player
• Slightly increased spawn rate

Creeper

• Doesn't get damage from explosions. Instead, they ignite
• Its explosion deals mining fatigue and weakness effects, duration depending on your distance with the creeper

Guardian