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.
Estimates range from 24-100 per DAY. One estimate goes as high as 600 per day! The problem is that we don't know how many species there are. In some cases we are still strugling to define a species, bacteria are extremely difficult. And it's also hard to determine when the last of a species dies. We thought the Ivory Billed woodpecker was extinct and now it may not be.