National Park Service on Instagram: "ALL GLORY TO THE HYPNOTOAD!!! The Sonoran desert toad (Bufo alvarius), also known as the Colorado river toad, is one of the largest toads found in North America, measuring nearly 7 inches (18 cm). Will it hypnotize you with its large oscillating multicolored eyes? That’s just silly….MUST SHARE TOAD FACTS!!! What sound does it make? Its call has been described as a “weak, low-pitched toot, lasting less than a second.” Ooops! Pardon me. These toads have promine