Croc – Floating Pond Protection from Defenders® protects garden ponds and pools from herons, cats and persistent bird pests. Simply fill the anti-drift anchor bag with pebbles from your garden and attach to Croc. Float Croc on the surface of the water, realistic motion is generated by water and wind movement. UV resistant to ensure a long life of predator protection. Ideal for water gardens, koi ponds, fish farms, and even swimming pools.