Bestiary



The Bestiary is an in-game catalog of Terraria's various entities, including enemies, NPCs, critters, and bosses. It can be viewed by opening the inventory and clicking the book icon located to the right of the item trash can. The Bestiary displays a description and basic statistics for each entity, including health, damage, defense, and knockback, as well as advanced information like item drop rates. Entries can be sorted and filtered by various criteria, like stats, locations, times, events, etc.

Initially, no information is available about any particular entity. There are four stages of progression for each entity, each unlocked based on a player's current experience level with that entity:
 * 1 kill: Name and portrait display
 * 10 kills: Stats display
 * 25 kills: Item drop lists display
 * 50 kills: Item drop rates display

Experience is tracked by various methods, depending on the entity type:
 * For an enemy, kills of that enemy are counted (kills made before the 1.4.0.1 update will not count). Enemies with multiple variants (such as zombies) have a separate tracker for each variant (50 Arrow Zombie kills, 50 Gel Zombie kills, etc.).
 * For a boss, just one kill is required to display all information.
 * For a critter, the counter advances based on how many of that critter type the player came into close proximity with.
 * For a Town NPC, the number of times the player chatted with that NPC is counted.

At the bottom of the Bestiary is a bar that fills as the Bestiary is completed, allowing players to track their progress. Bestiary progress is tied to a world, not a character. Unlocking 10% of the entities in the Bestiary makes the Zoologist NPC available, who sells progressively more items (eg. the Cat License) as the player completes more of the Bestiary. Unlocking all information for the entries is not a requirement for this, as long as the entries themselves have been unlocked.

Killing creatures spawned from Statues count in regard to the progression of the bestiary, making them useful for filling out information on rare creatures such as Medusa and Mimic.

Filters
From top-left to bottom-right in the Bestiary display. The "Number of Creatures" column may show double-counted creatures that appear in multiple biomes.

Trivia

 * The entry for the Lost Girl may be a reference to the show "".
 * The Pirate's Curse and Spiked Slime are the only killable enemies that do not have bestiary entries.
 * Unlike enemies such as the Zombie and Skeleton, the Shadow and Wood variations of Mimics do not have separate entries.
 * The maximum bestiary percentage that can be obtained in a Pre-Hardmode world (including bringing items over from a Hardmode world) is 64.42%, or 335 entries.
 * The maximum bestiary percentage that can be obtained in a Pre-Hardmode world without bringing items over from a Hardmode world is 51.92%, or 270 entries.
 * The entry for the Town Bunny may reference the Rabbit Perch, in which a bunny really does become a hat.

History
Bestiaire