Illustration of brown bird on a branch by a tree trunk with a blue background
As part of a set of 40, this button features a Wren bird. Wrens are tiny brown birds that have loud and complex songs. There are around 89 species living across North America, Europe, North Africa and Asia. According to Greek mythology, the Wren became king of birds by hiding on the back of an eagle and succeeding in flying higher in the sky than the eagle.