To keep ants out of hummingbird feeders, use an ant moat, which is a small water barrier preventing ants from reaching the feeder. Hanging the feeder with slippery fishing line, moving the feeder often, and using natural repellents like cayenne pepper, lemon juice, or peppermint oil sprayed around the feeder also help. Avoid using insecticides or sticky substances on the feeder parts where hummingbirds can touch, as these can harm the birds. Regularly check feeders for leaks, which attract ants, and prefer simple red feeders without yellow accents, which attract wasps and ants. Combining these methods creates an effective defense against ants while keeping hummingbirds safe.