Husk

Husks are a variant of zombies.

Spawning
80% of Zombies spawned aboveground in Desert, Desert Hills, and Desert M biomes will be Husks. If the Zombie does not have a view of the sky, it will always be a normal zombie, chicken jockey, baby zombie, or a zombie villager. Like normal Zombies, there is a 5% chance for baby husks to be spawned, and an additional 5% chance to spawn as a chicken jockey.

In the game code, they are considered like other Zombies and they do not have a unique entity ID. In the Zombie's NBT structure, there is a tag named "ZombieType", which is of 0 for a regular Zombie, and defines the Zombie a normal Zombie, a Zombie Villager, or a Husk. 1 to 5 values are for all the different Villagers' professions models for Zombie Villagers, and 6 is for Husks. Husks also have the same drops as Zombies. Otherwise said, even if Husks have their own egg in the creative mode inventory, they aren't a brand new mob (as opposed to Zombie Villagers, that do not have a spawn egg in the inventory).

If a Zombie is spawned in a Desert, Desert hills, or Desert M biome using a Zombie spawn egg, it has an 80% chance of being a Husk. No matter what biome you use a Husk spawn egg in, it will always be a Husk.

Behavior
Husks behave much the same as normal zombies do; however, they will not burn in sunlight. Additionally, they will apply the Hunger effect to any player it hits, where the duration is dependent on the regional difficulty - 7 × floor(RegionalDifficulty) seconds. They are visually 2 pixels taller than Zombies, but have the same hitbox.

Like Zombies, Husks will attack Villagers and Iron Golems within 42 blocks away, they can see these mobs through walls and will attempt to break down doors to get to them. Unlike Zombies, Husks are unable to break down doors, this probably is a bug and might get patched in a later snapshot.

Husks will pathfind to a player from 40 blocks or less.

For more information on Husk's behaviour, see Zombies behaviour as they are almost identical.

Drops
When killed Husks will drop 0-2 rotten flesh.

Husks will rarely drop carrots, iron ingots, and potatoes. Any picked up equipment has a 100% chance of dropping with the same durability as before the Husk picked it up. A Husk has an 8.5% (Looting I: 9.5% - Looting II: 10.5% - Looting III: 11.5%) chance of dropping naturally spawning equipment; this equipment will drop with a random durability.

When blown up by a charged creeper, the Husk will drop a Zombie head unless a different mob is blown up by the same charged creeper. If two or more mobs that can drop mob heads are blown up by the same charged creeper, the closest one will drop its head.

Husks drop 5 experience when killed by a player or tamed wolf, and an additional 1-3 experience if the Husk has equipment. If the Husk is a baby, it will drop an additional 7 experience.