Billed as the "holy grail" (or, if you prefer, the Elvis) of bird-watching, this rare woodpecker had eluded birders in the southern U.S. for about 50 years. One of the largest woodpeckers in the world, a kayaker spotted the ivory-bill in 2004. "Through the 20th century it's been every birder's fantasy to catch a glimpse of this bird, however remote the possibility," John Fitzpatrick, an ornithologist at Cornell University, told National Geographic.
7. 80 years later, biologists get a glimpse of one of the tiniest primates around