The most common and widely used is the decoy swan deterrents as Herons are generally the biggest natural problem, with ponds generally been clear filtered pond water with brightly colored goldfish and koi is no wonder why they can be treated like the local sushi restaurant. Decoy swan deterrents are more effective if moved around the pond every 3-4 days and removed in the Spring mating season.
Herons are solitary creatures and prefer to feed alone so the idea is they see a heron from above already at the pond and carry on to another place to feed.
All decoys work better when part of a bigger strategy with other items like a barrier system or other decoys like the Alligator Head, Hawk or Owl.
As always you can check PondH2o’s Online Pond Protection Shop. Read more in our information center on keeping your expensive koi pond fish safe from pond predators like cats, racoons, herons and other birds of prey here!
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