Ronald McCroby, a master whistler who performed with orchestras and jazz groups, died Monday Aug. 5 in Aurora, Ohio, of a heart attack. He was 68.He performed on “The Merv Griffin Show” and “The Tonight Show” five times, as well as the Kennedy Center in Washington, D.C., and in the Monterey Jazz Festival in California. McCroby studied music at West Virginia U. in his hometown of Morgantown, W.Va., paying his way through college as a jazz musician by playing the clarinet and saxophone. But it was whistling that brought him fame. McCroby also did voiceovers as a whistling penguin on the “Scooby-Doo” cartoon series as well as for “Winnie the Pooh” for Disney PlayStation ads and Tenderheart Bear on American Greetings Care Bear commercials. He is survived by wife Barbara.