The Hummingbird Feeder.com
This mount allows either size feeder to be mounted on a 1 inch pole and also is a large ant moat. It can also be used on the hanger of the large, 16 ounce feeder for supernatural ants. It's shown here with the large, 16 ounce feeder but the small feeder can use it, as well. This is handy for deck and porch railings.
Popular for feeding the fiercely, territorial Ruby-Throated Hummingbirds and you're feeding a dozen, or fewer, hummers.
Popular where Hummingbirds play well together and you're feeding more than a dozen hummers.