Coqui frogs are thought to be spread primarily by transporting infested vegetation. You can prevent accidentally transporting the frogs by carefully inspecting every plant or cutting you buy or bring home. Pay special attention to their favorite perching and hiding sites: where the leaves meet the stem, and in rolled or folded leaves. If you are uncertain, you can treat a plant with hot water or citric acid as described in previous sections.

If you hear chirping at night, it is most likely a coqui frog, because nocturnal birds usually do not make such sounds. When the weather is cool or dry, coqui frogs tend to call less than on rainy, warm nights. Inspect your yard for eggs, juveniles, and adults (see Hand Capture section).

Notify the source of the infested plants so that they can take measures to prevent further spread of coqui frogs.