The Rollers originated in the Hartz Mountains of Germany. The Roller sings softly with its beak closed. Its
throat feathers rise as it sings and can span as many as three octaves. Their colors vary from yellow, white,
green or gray to variegated. Occasionally Rollers are red-orange.
The song is delivered in a continuous rolling or trilling
manner 'whrrrrrrrrrr, trrrrrrrrrr or srrrrrrrr'. The lower
notes would be in the compass of Bass Roll and then,
progressing up the scale, they would constitute
Hollow Roll, finally reaching Bell Roll in the higher