Brown bear
Brown bear spawns in forests, and have behavior very similar to vanilla polar bear.
Cursed well
It looks just like normal old well...
Zombie miner
This husk has piskaxe, helmet and is "tough" (tough zombies have Health Boost and Damage Boost buffs)
Hazmat zombie
This is "normal", but hazmat suit makes him immune to potions.
Husk girl
A "normal" female husk.
Zombie warrior
This zombie has sword and is "tough" (tough zombies have Health Boost and Damage Boost buffs)
Zombie in short pants
Normal zombie
Chesthead
This zombie wears chest on head. Blind, but also has absorption. Can drop random loot if configured to do so.
All zombies in 1.16.5-1.0.2.1
These are all zombies in 1.16.5-1.0.2.1 version. Textures may change in next versions.
Zombie Alex
As name suggests, she is based mostly on Alex player skin and is "normal" zombie.
Zombie bear
Zombie bear spawns in forests, and is hostile to players, villagers, polar bears, brown bears, iron golems and turtles.
Antizombine recipe
Antizombine is the only cure from zombie virus. Recipe may change in next versions.
Frozen lumberjack
Inspired by "7 days to die" game. This zombie is even tougher than other "tough" zombies, but also is slow. Spawns only in snowy biomes.
Zombie girl with flowers on head
"Normal" zombie. Previous version didn't fit well with vanilla style, so I changed her skin to vanilla zombie's skin, but left clothes and flowers on head the same.
Cursed well
Normal when looking from surface. But it's past (and it's bottom) keeps a scary and dangerous secret...