River Update and new mob - beaver

Add Beavers to Minecraft – River Builders and Ecosystem Engineers

Overview

Beavers would be a new passive mob that lives near rivers and lakes, building dams and lodges, shaping the environment, and creating small ponds and wetlands.
They would bring life to river biomes, add new resources, and introduce dynamic environmental mechanics.

Spawn and Habitat

• Biomes: Rivers, Swamps, Taiga (especially near rivers).

• Spawn conditions: Within 5 blocks of a riverbank, at or below water level.

• Activity: Active during the day and dusk; retreat to their lodges at night.

• Group size: 1–3 beavers per group.

• Variants: Adult and baby beavers.

Stats

• Health: 14 (7 hearts)

• Speed: 0.35 on land, 0.7 in water

• Behavior: Calm and curious; flee or defend with a tail slap if attacked.

Behavior and AI

1. Collecting Materials

Beavers search for nearby trees (radius 8–12 blocks).
They gnaw on the trunks, breaking the bottom log blocks and producing Sticks or Gnawed Logs (a new item).
They use these materials to build their dams.

2. Building Dams

Groups of beavers identify a narrow river section and start building Dam Blocks made from gnawed logs, mud, and sticks.
Dams slow or block water flow, slightly raising the water level behind them — forming ponds.
They build over time (in phases), with visible placement animations.

3. Building Lodges

Near completed dams, beavers sometimes build lodges — small dome-shaped huts of sticks and mud.
Inside, baby beavers can spawn and hide at night.