Normal Behaviors: These behaviors are seen mostly in creative and harmless mode. Animals use these behaviors when they are not provoked.
Fly Around: Birds fly around in a given area.
Swim Around: Makes fish swim around in a given area.
Walk Around: Makes land animals walk around a given area.
Random Feeding: Makes animals eat randomly. Ex: cow will randomly eat grass under its feet.
Random Peck: Makes birds peck at ground randomly.
Laying Eggs: Birds wll lay eggs when left alone.
Herd: Makes animals of the same kind stay together. [Only used by Cows/Bulls, Wolves, Coyotes, Ostriches, and Horse]
Eat Pickable Items: Predators will eat the meat of a dead animal, Herbavores will eat plants you drop.
Stare: Makes animals stare at you and nearby creatures.
Defensive Behavior: Animals use these behaviors when attacked.
Fly Away: Used by flying birds. They will fly away when scared/hurt.
Swim Away: Used by water animals. They will swim away when scared/hurt.
Run Away: Used by land animals. They will run away when scared/hurt.
Cattle Drive: Makes animals [Cow/bulls, Camels, and Ostriches] run fromwhistle sound.
Attack Behavior: Animals use these when provoked.
Chase: Predators will chase you to a certain point.
Defend Other: some animals will join in a fight with others to defend them. For example, bulls will defend the same-colored cows.
Find-Player: Predators will try and find you at night.
Howl: Used by wolves. They howl and then attack you in a group.
Pathfinding: Used when a predator is looking for you, or when you drop food.
Steed Behaviors: Used by saddled animals.
Steed: Makes saddled animals obey players directions.
Dump-Rider: Animal dumps an unwanted rider [only if animal is unsaddled].
Summon: Steed comes when you whistle [within a 30 block range].
Stubborn: Steeds, especially donkeys, will refuse to move.
Water Animal Behaviors: Used by water animals.
Fish-Out-of-Water: Makes all water animals [except for whales] flop around when out of water.
Dig-In: Used by rays. Dig into mud [Brown Ray] or sand [Yellow Ray]. Makes them nearly invisible.
Sting: Rays will sting you when stepped on.
Spray Water: Orcas and Beluga Whales spray water from blowholes.
Stay Near Surface: Orcas and Belugas breathe air and must stay near surface or they will drown.
Animal Aggresion: Used when animals act with hostility towards each other.
Aggression: A predator will attack another animal for food.
Fight Back: A normally passive animal may fight back when attacked by a predator.
Kaalus has implemented an advanced animal behavior mechanism. There can be several behaviors the animal is engaged in at one time. Each is assigned a value according to how critical it is to the animal and the most critical behavior is the one that is executed. This lets an air breathing animal chase you even under water, but when it starts losing air it will stop chasing and surface to breathe. They will also eventually 'get bored' with chasing you and give up, if you can outrun them long enough.