Vanilla Mob Changes

Bees / Killer Bees / Mosquitoes
Bees, Killer Bees, and Mosquitoes will move whilst attacking, which makes fighting them a bit more difficult. Mosquitoes will heal to full health after attacking a player.

Volt Goats
Volt Goats deal 40 damage. Instead of a 25% chance to drop a Volt Goat Horn, they have a 50% chance to drop either a Volt Goat Horn or Electric Milk.

Spiders
Spider Warriors & Depth Dwellers have 300 Health but deal 30 Damage. Spitter Spiders have a 33% chance to drop a Spituitary Gland. When any spider kills another mob, it will leave behind creep that lasts for around 5 days where the mob died.

Varg
The Varg spawns hounds less often and once he reaches 750 health he kicks into phase two, where he stops summoning them all-together. In Phase 2, The Varg takes on an eviler appearance and he has boosted stats. When killed, The Varg will drop a purple gem alongside it's normal loot.

Merms
Merms now have 250 health (note that it is still 560 if the merm king is around.) When killed, Merms will drop a special kind of meat.

Tentacles
Tentacles will "eat" items on the ground next to them at night. If it eats enough hunger's worth of food, it will spawn a 'Baby' Tentacle nearby. The Baby Tentacle has inferior stats and takes three days to grow into a normal Tentacle. It has a higher chance to drop tentacle spots but cannot drop tentacle spikes.

Tentacles and Baby Tentacles will knock items out of the player's inventory.

Glommer
Glommer's rate of dropping Glommer's Goop is halved, but can be raised to very high levels by feeding it. If fed a food with a high enough hunger value, Glommer will give you a free goop.

Lureplants
Lureplants spawn a bit more often. During the spring, they may reliate an attack by sending out plant spores if their health is below 50%.

Treeguard
The Treeguard is now a much more formiddable opponent. When engaged, it will surround itself in an 'arena' of unbreakable pine trees. The trees will dissapear after 20 seconds, giving the player a chance to escape before the Treeguard summons them again.

When below 50% health, the Treeguard will summon Enraged Roots from the ground to attack the player. They deal 34 damage but only have 20 health.

Miscellaneous

 * Clockwork Rooks no longer run away, and they charge faster with a smaller wait in between charges.
 * Broken Clockwork Bishops drop gears instead of thulecite fragments.
 * Catcoons drop 1 Morsel with a 50% chance to drop their tail
 * Gobblers Drop 1-2 Gobbler Feathers
 * Some Herbivores will eat farm crops and bulbous lightbugs