I have a small pond (an irregularly-shaped concrete basin) in my yard which I keep filled with water for the use of birds and wild animals. I have a small tube attached to a nearby faucet which drips into the pond. The dripping water not only helps keep the pond full and the water fresh, but it also attracts birds who are very interested in the sound of any water here in the desert, and I have seen numerous birds and animals at my small pond.
Normally, Roadrunners will chase away Rock Squirrels because these squirrels are determined egg thieves, but the Roadrunner's young have left the nest, so he tolerates Rock Squirrels… For now. Rock Squirrels are far too large for Roadrunners to consider them prey, but Roadrunners will catch and eat smaller squirrels and rodents.