It was definitely “whap whap” that I heard, not “beep beep.” We were exploring the Botanical Garden area at the Riparian Preserve at Water Ranch. A Greater Roadrunner scurried by and disappeared into the sticks and shrubs. We were lined up along the trail when I heard the sound. As I crouched and peered through the dense thicket, I could see movement and each movement coincided with a “whap.” By the time I realized it was the Roadrunner beating an unfortunate frog into submission and was able to move to a place where I could see him, he had already swallowed the frog and was frozen in place in what was probably the avian version of a food coma.