What is the more common name of the Chaparral Cock

Greater roadrunner
The greater roadrunner (Geococcyx californianus) is a long-legged bird in the cuckoo family, Cuculidae, from Southwestern United States and Mexico.

The Latin name means "Californian earth-cuckoo".

Along with the lesser roadrunner, it is one of two species in the roadrunner genus Geococcyx.

This roadrunner is also known as the chaparral cock, ground cuckoo, and snake killer

https://en.wikipedia.org/wiki/Greater_roadrunner