verb. To quell is to stop or quiet something. An example of quell is to soothe someoneâs anger.
Overview. Black-backed Woodpecker: Small woodpecker with black back, black wings with white spots on flight feathers, barred flanks, white underparts. Head has a conspicuous white cheek mark and yellow crown. Tail is black with white outer tail feathers. Black bill is long and stout. Legs and feet are gray.
The ivory-billed woodpecker ranks among the largest woodpeckers in the world and is the largest in the United States. The closely related and likewise possibly extinct imperial woodpecker (C. imperialis) of western Mexico is, or was, the largest woodpecker. Cuban ivory-billed woodpecker (Campephilus principalis bairdii or Campephilus bairdii), now believed to be extinct. 2  American ivory-billed woodpecker (Campephilus principalis principalis or Campephilus principalis), described here.