Herons and egrets are common pond predators that feed on koi and other pond fish. Once these birds discover an easy food source, they may return repeatedly.
How to protect your koi
- Install protective pond netting: Secure netting over the pond to prevent birds from reaching your fish.
- Provide fish caves: Add underwater caves or rock shelters where koi can hide from predators.
- Use predator decoys: Heron and other predator decoys may help discourage visiting birds. Move stationary decoys periodically.
- Use motion-activated sprinklers: These can startle approaching birds and discourage them from visiting.
- Provide plant cover: Aquatic plants and overhanging vegetation can give fish additional places to hide.
Signs of heron or egret activity
- Koi or other pond fish suddenly disappearing.
- Fish with puncture wounds or other injuries.
- Fish hiding more frequently than usual.
- Herons or egrets visiting or standing near the pond, especially early in the morning.
Can herons or egrets be removed?
Herons and egrets may be protected by local wildlife laws. Do not harm, trap, or relocate these birds without first checking the regulations in your area.
Use humane deterrents to protect your fish. Contact your local wildlife agency for guidance if the problem continues.