Colorado River Toads are commonly found in the greater Tucson, Arizona area particularly during monsoon season. At dusk, the slow hopping of the toad will often attract dogs. The dog will grasp the toad in its mouth causing the toad to secrete a toxin from the poison glands behind its ears. The toxins are absorbed through the membranes of the dog's mouth and stomach resulting in a variety of symptoms. These symptoms may result in death in 15 minutes!