The Yellow-billed Cuckoo is a slender, long-tailed bird that breeds in Arizona’s riparian woodlands, especially where cottonwood, willow, and mesquite grow along rivers and streams. Recognized by its downcurved bill with a yellow base and bold white spots on the underside of its tail, this species is often seen moving slowly through dense foliage as it hunts for large insects such as caterpillars, cicadas, and katydids. In Arizona, it is a late migrant, usually arriving from Central or South America in late May or June, with breeding timed to coincide with the summer monsoon season when insect populations peak. Nests are loosely constructed platforms hidden in dense vegetation, and by September most birds have departed southward. The western population (Coccyzus americanus occidentalis) is federally listed as Threatened due to widespread loss of riparian habitat, and today the species is most reliably found along the San Pedro River, Verde River, Bill Williams River, and portions of the Lower Colorado River Valley, where conservation efforts are focused on restoring and protecting critical riparian ecosystems.
