Campephilus principalis. Print. The ivory-billed woodpecker (Campephilus principalis) is one of the largest woodpeckers in the world. at roughly 20 inches (51 cm) long and 30 inches (76 cm) in wingspan. It is native to types of virgin forest ecosystems fo

Campephilus principalis. Print. The ivory-billed woodpecker (Campephilus principalis) is one of the largest woodpeckers in the world. at roughly 20 inches (51 cm) long and 30 inches (76 cm) in wingspan. It is native to types of virgin forest ecosystems found in the southeastern United States and Cuba. Habitat destruction and. to a lesser extent. hunting has reduced populations so thoroughly that the species is very probably extinct. though sporadic reports of sightings have continued into the 21st century. The ivory-billed woodpecker. dubbed the "holy grail bird. (Photo by: Sepia Times/Universal Images Group via Getty Images)