What is "colaptes aurutus"

Flicker \Flick"er\, n.

1. The act of wavering or of fluttering; fluctuation; sudden and brief increase of brightness; as, the last flicker of the dying flame.

2. (Zo["o]l.) The golden-winged woodpecker ( Colaptes aurutus); -- so called from its spring note. Called also yellow-hammer, high-holder, pigeon woodpecker, and yucca.

   The cackle of the flicker among the oaks.
   --Thoureau.