Piglin

Piglins are hostile mobs that spawn in the Nether. They are equipped with crossbows or golden swords. They are naturally hostile toward the player, but become neutral if the player wears golden armor.

Spawning
Piglins spawn commonly in groups of 1–3 in crimson forest and uncommonly in the nether wastes biomes. Each piglin has a 25% chance of being a baby.

Adult piglins spawn with either golden swords or crossbows and occasionally wearing golden armor. Baby piglins spawn without any equipment.

Drops
Piglins have 8.5% chance of dropping their naturally-spawned equipment and drop it with random durability. Each level of Looting increases the chance by 1 percentage point (11.5% chance with Looting III).

Any picked-up equipment or other picked items have 100% chance of dropping and drop without changing the damage that has accumulated on it.

Naturally-spawned equipment

 * Random Golden Armor
 * Random Golden Armor
 * Random Golden Armor

Experience
Piglins drop experience if killed by player or tamed wolf.

Behavior
Piglins are hostile to the player, unless the player wears at least one piece of gold armor. With it, they become neutral, but still attack the player if provoked. Piglins are provoked by breaking or opening a chest, trapped chest, ender chest, barrel, or a shulker box in their sight, or mining a block of gold in their sight.

Piglins attack wither skeletons, but only if there is at least one other piglin nearby. They also attack adult hoglins occasionally. Baby piglins are passive and never attack anything. They also play with baby hoglins, running around. Iron golems attack both adult and baby piglins; piglins won't attack an iron golem until it attacks first.

When attacking, an adult with a crossbow shoots arrows every 2 seconds, and walks backward (stopping if at the edge of a drop) as soon as the enemy is close. Unlike bow-armed mobs, they do not strafe from left to right while shooting. Piglins with swords and other equippable items just rush at a player.

Piglins willingly downgrade to golden armor if they are wearing higher tier armor, or armor that has higher durability than gold, such as iron, chainmail, diamond, or netherite armor.

When in the Overworld, piglins transform into zombified piglins after about 20 seconds. When they transform, they lose all their armor and held items and gain a golden sword. Upon transformation, the newly spawned zombie pigman has the Nausea effect for 10 seconds. This does not occur in the End.

Piglins that are not currently attacking retreat from zombie pigmen, soul fire, soul fire torches, and soul fire lanterns. Piglins are capable of opening doors.

Piglins drown in water, they do not swim.

Despite being a nether mob, piglins are not immune to fire damage unless affected by fire resistance.

Picking up items
Any piglin can pick up and equip any gold related item, regardless of their ability to pick up other items. While doing so, piglins "contemplate" the specific item by looking at it for a moment.

Piglins have eight hidden inventory slots and they are able to stack items just like a player would be able to. Piglins with full inventories will continue to attempt to pick up items like normal, but will instead throw them on the floor after contemplating them, which leads to an endless cycle of picking up and throwing out the item. Baby piglins attempt to pick up any item and can steal from players. Adult piglins can pick up any golden item and porkchops, but they won't actively seek out and contemplate porkchops and gold nuggets, instead if either of those items are nearby it they will instantly place it in their inventory. Piglins will drop any of these items on death aside from gold ingots, raw porkchops and cooked porkchops.

Trivia

 * Piglins are one of only four mobs in the game that can willingly give items to a player.
 * Despite unlocking the "Monsters Hunted" or "Monster Hunter" advancement when killing them, they do not despawn in peaceful difficulty.
 * Piglins cannot ride on other entities; if summoned as a passenger they immediately dismount.
 * Piglins are also one of only two mobs that can wield crossbows, the other being pillagers.
 * A mob similar to piglins, the pigman, was a mob that was originally supposed to inhabit villages but scrapped in favor of villagers.
 * Piglins can recieve damage from fire and lava, as do hoglins.
 * Baby piglins never grow up.