The yellow flowers attract many kinds of insects, including bees and butterflies, some of which, such as the Painted Lady and the Silvery Checkerspot, use the plant as a larval host.
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Several Bidens species are used as food by the caterpillars of certain Lepidoptera, such as the noctuid moth Hypercompe hambletoni and the brush-footed butterfly Vanessa cardui, the Painted Lady.