Flower Ant Moat How to keep ants off hummingbird feeders? The Flower Ant Moat is an attractive, whimsical solution for ending the incessant ant traffic around hummingbird feeders, and nocturnal earwig visits that often result in these insects becoming trapped in bee guards or drowning in nectar. Simply hang above the hummingbird feeder, and keep filled with water. The Flower Ant Moat is the most decorative ant moat available, so adorable one forgets its important function! Bonus! Even when a bird bath with running available nearby, chickadees greatly favor the ant moats as a source of drinking water. View movie below: