The Willawaw was a huge owl-like monster with glowing yellow eyes, a sharp beak, and big claws to grab his victims.
The Scooby-Doo Show
The Indians on the land told the gang that if an owl called your name then the Willawaw would swoop down from the skies and take you to his cave. It turned out that the Willawaw was a balloon with a motor that was piloted by one of the Indians, Grey Fox. He took advantage of the legend of the Willawaw cover up his smuggling operation into Canada. When he found out at some point that Dave Walton was on his trail, he sent his henchmen, the Owlmen to kidnap him while he was eating dinner. After Dave was rescued by Red Herron, Grey Fox and the Owlmen were then taken into custody by Red Herron to the council of elders for punishment.