Herons and Frogs Eating Koi/Goldfish: Protection Strategies

Predator Management: Herons vs. Frogs

Owner asks about "cranes" (likely herons) and frogs eating fish, and how to get rid of them.

Herons (Protected by Law)

• Cannot harm, harass, or kill (Migratory Bird Treaty Act).
• Deterrence only: netting (best), electric fence, motion sprinkler, decoys (move daily).
• See Heron Deterrence.

Frogs

• Bullfrogs eat small goldfish/koi fry. Native frogs rarely bother 4"+ fish.
• If bullfrogs: relocate (check laws).
• Predation is natural; a few losses balance the ecosystem.
• See Frog Deterrence.

Perspective

Accept some loss. Net the pond if losses are unacceptable. Herons and frogs are part of a healthy habitat.