Bird watchers typically fill hummingbird feeders with an ordinary solution of white table sugar and water. This sugar water attracts a variety of other birds, in addition to insects and larger mammals. Different hummingbird feeder designs may attract a varying selection of other birds.
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Woodpeckers particularly appreciate hummingbird feeders with ports large enough that they can fit their beaks into, and some bird aficionados purposely choose feeders that attract hummingbirds and woodpeckers.
Orioles rely on plant nectar as an integral part of their diet. The brightly colored birds often feed from hummingbird feeders, and may even fight with hummingbirds over the feeder's territory.
Chickadees also appreciate the free sugar water snack provided at hummingbird feeders. These small birds can cling to a variety of surfaces, making them adept at feeding even from hummingbird feeders without perches. The insects that flock around hummingbird feeders may provide an additional lure for these small songbirds.