Fustonins are small, blue birds that live near active volcanoes. They are extremely light and can fly at speeds of up to 300 mph. They have no beaks and instead use the hard, pointed end of their shoulder to peck at the sides of a volcano and pry off lava rocks that they then carry back to their nests. Because of their shiny, blue color and friendly demeanor, fustonin are often kept as pets and are a popular subject for many children's books, where they're referred to as "fussies".