Oak Leaf Galls ("Jumping Beans"): Harmless to Grass, Plants, People

Tiny brown balls on ground under oak, jumping like Mexican jumping beans. Identified as oak galls.

Facts

• No damage to grass, plants, or humans.
• Contain wasp larvae. They hatch, enter soil, emerge as adults, lay eggs on oak leaves—cycle repeats.

Resource

Oak Gall Life Cycle Details