A Brockton, Massachusetts homeowner was recently stunned to discover a great blue heron hulking over her Koi pond. The large, long-billed bird was sizing up its prey, ready to strike. One of her neighbors said that the heron had raided 10 of his fish. The birds often invade backyard ponds during the warmer months looking for a quick meal, a meal that cost pond owners upwards of $200 each. The pond owner decided to build a PVC cover with chicken wire to protect her investment from the winged culprits, which stand over 4 feet tall, with an imposing 6-foot wingspan. Ornithologists note that herons often attack Koi ponds, even in urban areas.
Herons area skilled and patient hunters, stalking their prey slowly through the water, then remaining motionless until a fish swims by. A quick stab with its sharp bill and the Koi is history.
Initial steps to protect costly Koi from becoming a Heron meal include adding floating vegetation and underwater structures for fish to hide under, and to provide enough water depth for the pond. Of course, the best way to keep fish safe form herons and cranes is to bird-proof the pond. Here’s what the bird control experts at Bird-B-Gone recommend:
Pond Defender™
A plastic disc that floats just below the water’s surface, Bird-B-Gone’s Pond Defender™ provides a safe haven for fish, protecting them against herons and cranes. The Pond Defender installs in a snap and consists of 12 interlocking plastic discs to create an aesthetic geometric shape, one that effectively blocks out fish predators. The discs virtually disappear below the water’s surface and fit easily into any shape pond. Installation is easy using the supplied clips, and discs can be arranged to fit most ponds or water gardens. For best results, use two rows of Pond Defender discs to prevent large birds from reaching into the pond and attacking your fish. The discs can be easily removed for cleaning. The Pond Defender is built to last and made of a UV- protected plastic (polypropylene) that will permit your plants to grow through its geometric openings.
Bird Scare Visual Deterrents
Easy to use and install, Bird Scare Visual Deterrents create an “Optical Distraction Zone” that keeps birds away from ponds and other water features. Choose reflective foils that crackle in the breeze, shiny tape banners that crinkle in the wind, or balloons with huge predator eyes that bob and weave. These deterrents can easily be attached to fence posts, tree limbs, patio covers or any elevated area. Balloons can also be partially filled with water and allowed to skim the surface of your pond to keep pest birds away. Visual Deterrents like these are designed to make pest birds feel threatened and uncomfortable. You'll need to move these deterrents around from time to time to keep birds from getting used to them.
For additional advice on how to keep pest birds away from your pond or water feature, consult an expert like the folks at Bird-B-Gone.