You can get a feeder with or without the ant guard. If you do not have one attached to it you can purchase the accessory separately and attach it to your feeder.
How does the ant guard work?
A hook at one end of the ant guard attaches to the hanger or hook where you are hanging the feeder and the other end of the ant guard attaches to the hummingbird feeder. Between the two hooks of the ant guard is the baffle with a base. Inside the baffle is a poison only the ants have access to. When the ants climb onto the hanger, they must climb down the outside of the baffle towards the feeder. They then are forced to climb inside the baffle in order to reach the nectar inside of the feeder. When the ants reach the poison it creates a barrier making it difficult for the ants to reach the nectar inside the feeder.
How does the built in ant moat work?
The hummingbird feeders built in ant moat prevents ants from reaching the nectar in the feeder. To reach the feeder the ants must go through the ant moat, which is filled with water. The water prevents the ants from reaching the nectar, because ants do not swim.
The best hummingbird feeders to buy are the ones that you can hang. Make sure you clean and scrub the entire hummingbird feeder one or two times a week to keep the birds healthy. Cleaning the feeder will attracts more birds to your feeding station.