What's wrong with this?

I read this in the paper the other day. These scientists - Scientists Slobodchikoff, Kiriazis, Fischer and Creef applied the scientific method to a series of field experiments they held, testing the ability of a particular species of animal to transmit semantic information to one another. More specifically, the experiment was performed on a Gunnison’s prairie dog, Cynomys gunnisoni, in order to study how these prairie dogs are able to send and receive signals regarding the presence of potential predators. More so, they analyzed the distinctions in alarm calls for different predators. They’re hypothesis was the alarm calls are assorted for predators of various colors, shapes and sizes. But what the hell? Humans arent natural predators of prairie dogs? Dogs don't fall for that shit.