It's a Big Big World

In Good Voice/Wartz's Family Tree (1x39)

Air date: Apr 19, 2007

In Good Voice: When Oko the owl loses his voice, Bob searches for another animal to duplicate his night howl. Wartz's Family Tree: Wartz overhears Burdette and Ick discussing their family trees and, afraid he doesn't have one, names a log his family log.