act as the functional units of the respiratory system by passing oxygen into the body and carbon dioxide out of the body. Finally, the muscles of respiration, including the diaphragm and intercostal muscles, work together to act as a pump, pushing air into and out of the lungs during breathing.
The Ivory-billed Woodpecker (Campephilus principalis) is an extremely rare member of the woodpecker family, Picidae. It is officially listed as an endangered species, but by the end of the 20th century had widely been considered extinct until it was apparently sighted along the Cache River in Arkansas in 2004 and 2005.
The threatened Red-cockaded Woodpecker lives in the southeastern states but mostly in Florida. The remaining 7 types of woodpeckers live in the central states into the western regions of the United States and Mexico. These are the Acorn Woodpecker, Arizona Woodpecker, Gila Woodpecker, Golden-fronted Woodpecker, Ladder-backed Woodpecker, Lewis's Woodpecker and the Nuttall's Woodpecker. The Ivory-billed Woodpecker which has not been seen in North America since the late forties and early fifties is considered extinct.