The panel are played a recording of a prairie dog squeaking and are asked what it is saying. According to Prof. Con Slobodchikoff of Northern Arizona University who has studied them for 30 years, it is saying that, "there is a human approaching wearing a yellow shirt." They can tell the difference between different types of predator, humans, badgers, geometric shapes and coloured shirts that humans are wearing. They can determine different heights of humans, but not different genders.