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Description
Biology Dictionary
Discover, highlight, inspect, modify — your vanilla & modded mob encyclopedia
Sound familiar?
| Problem | Solution |
|---|---|
| Want to explore all mobs | Check your discovery progress in the dictionary |
| Want spawn biomes, drops, food, speed, hitbox… all at once | View all base properties on a single page |
| Curious about horse, panda, or villager variants | Browse all variants (and change them in Creative) |
| Baby mobs are too adorable to grow up | Lock growth, keep them babies forever |
| Dozens of chickens in a cooker are deafening | One-click mute — offspring inherit it too |
| Can't find the villager's job site in your trading hall | One-click locate, no more blind digging |
| Villagers keep crafting bread, breaking your auto-farm | Steal their inventory, fill with junk, stop wheat pickup |
| Bees flew off — which hive did they go to? | View hive honey levels and bee counts, track them home |
| Cross-dimension mob transport is a nightmare | Lock or force nether portal teleportation |
| Want static NPCs in your survival builds | Disable AI + set invulnerable, done |
Features
- No new blocks or entities. Vanilla-friendly and safe to uninstall anytime.
- Full support for vanilla and modded mobs alike.
Inspection
- Mob Discovery — Track your dictionary progress; discover mobs by viewing details, scanning with the telescope, highlighting, killing, interacting, and more
- Entity Highlight — Highlight a specific mob type within 100 m to quickly track down rare spawns
- Health & Effects — Real-time health bar and active status effects
- Speed & Jump — Precise movement speed (m/s) and jump strength (m)
- Loot Table — Full drop table for any mob
- Spawn Info — Spawn biomes and structures (modded content supported)
- Hitbox — Exact bounding box dimensions
- Variants — Villager outfits, horse markings, cow biome variants, panda genes, and more
- Food — Items that tempt or breed the mob
- Breeding Status — Cooldown timer and love status
- Villager Job Site — Locate the workstation with one click
- Villager Schedule & Restock — Daily schedule and restock count
- Beehive — Honey level, bee count, hive location
- And more — Dolphin moisture, screaming goat check, pet owner info, etc.
Modification
All modifications cost in-game resources (XP, items, etc.) to keep things balanced.
- Lock Growth — Freeze baby mobs permanently
- Prevent Breeding — Block mobs from entering love mode
- Portal Control — Prevent or force nether portal teleportation
- Remove AI — Disable AI for static NPCs or decoration
- Force Persistence — Stop mobs from despawning
- Set Invulnerable — Make a mob immune to all damage
- Mute — Silence mob sounds; offspring inherit the trait
- Inventory — View and take items from villager inventories
- Change Variants — Swap villager outfits, horse markings, cow variants, panda genes, etc.
- Force Restock — Instantly refresh villager trades
- Retain Trader — Keep a wandering trader from despawning
- Gift Pet — Transfer a tamed mob to another player
- Spawn Egg — Obtain the corresponding spawn egg (Creative only)
- And more — Force sheep to eat grass, and more
Mod & Datapack Support
- Custom Entity Descriptions — Add or override mob descriptions via resource pack
- Custom Spawn Descriptions — Manually adjust spawn biome and structure descriptions via datapack
Controls
Open the Biology Dictionary by:
- Right-clicking the book item while holding it
- Pressing the hotkey (default
`) — requires the book in inventory (Survival), or is always available (Creative / configured)
The screen you get depends on where you're looking:
| Looking at | Opens |
|---|---|
| Block / Air | Home screen |
| Entity | Entity detail screen |
| Beehive | Beehive info screen |
| Straight up | Home screen (always) |
| Straight down | Your own detail screen |
Obtaining
The book is a plain minecraft:writable_book with embedded NBT — no custom items, fully vanilla-compatible. In Creative mode (or with hotkey configured for Survival), you don't even need it.
Creative
Find it at the end of the Tools & Utilities tab.
Survival
Buy from Wandering Traders. Sell chance starts at 100% and gradually drops to 20% over time, without taking up any vanilla trade slots.
Easy to find early when you're broke, impossible to find later when you're rich (cue evil laugh)~
Kidding — it takes about 2 real-time days (144 in-game days) to hit 20%. You'll be fine.
Pack authors can disable trader sales in the config and add their own recipes instead.
Dependencies
| Loader | Required |
|---|---|
| Fabric | Fabric API, Cloth Config |
| NeoForge / Forge | Architectury API, Cloth Config |
About
- Vanilla-Friendly — No new blocks or entities. The book reverts to a normal writable book on uninstall; reinstall to restore it.
- Mod-Friendly — Compatible with virtually all modded mobs, with extension support for mod developers.
- Balanced — Every modification has a resource cost to respect game balance.
- A complete rewrite of Bole.
The Biology Dictionary Team
