Predator Prey Ecosystem

Spawn herbivores, predators, and plants — then observe Lotka-Volterra population cycles and food chain dynamics emerge from simple rules.

Plants: 0

Herbivores: 0

Predators: 0

Time: 0s

Population over time (green = plants, blue = herbivores, red = predators)

Plant Growth Rate 0.02

Plant Max 200

Sim Speed 1.0x

Speed 1.5

Hunger Rate 0.003

Reproduce Threshold 0.8

Speed 2.0

Hunger Rate 0.004

Reproduce Threshold 0.85

Click on the field to spawn the selected creature type
Click & drag to scatter multiple creatures
1 Plant — 2 Herbivore — 3 Predator
Space Pause/Resume — R Reset
Plants grow randomly and spread. Herbivores eat plants for energy. Predators hunt herbivores.
Creatures reproduce when well-fed and die when starving. Watch the population graph for classic boom-bust cycles!