The expansive dinosaur group that includes big hunters like the T. rex has a strange new member. Its bones were found in Mongolia. Scientists named the new dinosaur Natovenator polydontus. They say it was about the size and shape of the bird called a goose. It also had a long neck, similar to a goose’s. But, it was not a bird, the scientists say. The research suggests the animal was semi-aquatic, meaning it spent much of its life in water. It lived about 72 million years ago during a period of time called the Cretaceous Period. It was built like a diving bird, with a body meant for quickly swimming in water. Inside its mouth, were about 100 small teeth, the scientists said. And, they said they believe the dinosaur was covered in feathers. Yuong-Nam Lee of Seoul National University in South Korea is lead writer of the research published in the journal Communications Biology. He said Natovenator has many “peculiar” qualities. It was the cousin of the speedy little meat-eating dinosaur the Velociraptor. But Natovenator was adapted to a life that involved a freshwater environment. The researchers said the animal may have floated on rivers and lakes, diving to hunt and using its long neck to catch fish and insects. Natovenator’s skeleton is about 70 percent complete. It was unearthed in the Gobi Desert. Many dinosaur skeletons have been found in the desert in recent history.