Walruses have a huge vocabulary of sounds. They whistle, they grunt, and they can even sound like a steam train. But, Rosemary Ponnekanti says, they also can sound musical. “They make bell-like sounds and they can use their flippers to make percussive noises,” said Ponnekanti, who works on the communications team at the Point Defiance Zoo and Aquarium in Tacoma. “They also get this funny, guttural kind of (sound) — I can’t even do it myself because I don’t have the right equipment in my voice.”