Hummingbirds may use an oriole feeder, but it's not their preferred type of feeder. Oriole feeders typically have larger openings for the birds to access nectar, which can be difficult for hummingbirds to use. Additionally, orioles prefer to eat fruit in addition to nectar, while hummingbirds primarily feed on nectar. Using a specifically designed hummingbird feeder to attract these birds to your yard is best.