How do roadrunners differ from most tree-dwelling cuckoos?

Roadrunners differ from most tree-dwelling cuckoos primarily in their habitat, locomotion, and nesting behaviors:

• Habitat: While most cuckoos are forest-dwelling birds that inhabit dense thickets or woodlands, roadrunners are terrestrial birds adapted to open scrub and cactus deserts, often thriving in areas without large vegetation.12
• Locomotion: Most cuckoos are arboreal, whereas roadrunners are specialized for life on the ground. Although roadrunners are capable of flight, they are clumsy and tire quickly, preferring to run along roads or across open flats at high speeds.13
• Nesting: Unlike many cuckoos that are known for brood parasitism—laying their eggs in the nests of other species—roadrunners build their own substantial nests of twigs, typically located low in a cactus or small tree.145
• Diet: While cuckoos are generally insectivorous, roadrunners are notable for their ability to hunt and consume small vertebrates, including lizards and snakes, which they pound to death with their stout bills.16