I was searching for the source of the sound this guy was making, Oo-Oo-Oo-Oo-Oo-Oo with each succeeding Oo slightly lower in volume. I did not expect to find a Road Runner perched high in a tree. The lizard in his beak was a bonus. I suspect this is a love sick male trying to attract a mate with his call and the offering of a tasty snack.