the flicker is a woodpecker,colaptes auratus.

A yellow-shafted flicker is a yellow songbird in the hummingbird family, Latin name Colaptes auratus.

Birds tend to like a cactus plant's fruits and seeds. Among the birds that are partial to cactus body parts are cactus wrens[Campylorhynchus brunneicapillus], elf owls[Micrathene whitneyi], gilded flickers [Colaptes chrysoides], Gila woodpeckers [Melanerpes uropygialis], red tailed hawks [Buteo jamaicensis], and white winged doves [Zenaida asiatica]. Additionally, some birds may be caught nibbling their way through a cactus plant's thickened outer stem, to form nesting cavities inside. Particularly famous fleshy, juicy cactus tissue eaters are Gila woodpeckers and red tailed hawks.

Flickers are related to woodpeckers. They use their beaks to locate insects that live in, on, or under the bark of trees. They also get some nutrition from some sap that may occasionally accompany the insect as they are eating it.

To flutter; to flap the wings without flying., To waver unsteadily, like a flame in a current of air, or when about to expire; as, the flickering light., The act of wavering or of fluttering; flucuation; sudden and brief increase of brightness; as, the last flicker of the dying flame., The golden-winged woodpecker (Colaptes aurutus); -- so called from its spring note. Called also yellow-hammer, high-holder, pigeon woodpecker, and yucca.