Flutterflies are the butterflies that appear in Wow! Wow! Wubbzy!.
Flutterflies look much like real-life butterflies, but their names are a bit different. Norm is yellow and has pink spots on the wings. The rest of the flutterflies in Wuzzleburg are purple and pink. In "The Grass is Always Plaider", the flutterflys are a bit darker and plaider.
The flutterflies first appeared in the "Flutterflies" short. They also appeared several times throughout the series.