The nectar of the flowers attract fewer insects than Bidens spp. with showier flowers. Occasionally, they are visited by bumblebees, Halictid bees, wasps, bee flies, Tachinid flies, small butterflies, and other insects. The caterpillars of several species of moths feed on the foliage or pith of the stems, including Epiblema otiosana (Bidens Borer Moth), Platysenta mobilis (Mobile Groundling), Condica confederata (The Confederate), Cirrophanus triangulifer (Goldenrod Stowaway), and Palthis asopialis (Faint-Spotted Palthis). The seeds are eaten by small rodents and various birds, including the Ring-Necked Pheasant, Bobwhite, Swamp Sparrow, and Purple Finch. The Cottontail Rabbit occasionally eats the foliage. The awns of the seeds readily cling to the fur of animals and clothing of humans, thus promoting the spread of this plant far and wide.
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