The U-S Fish and Wildlife Service is putting the final touches on a plan to restore an historic migration route of one of North America's most endangered birds. The whooping crane was on the verge of extinction in the early 1940's, with only 16 birds left in the world. The species is now about 400 strong, with three separate groups of birds nesting in the wild. One of the flocks migrates across the American west, following a path from Canada to Texas. Now officials hope to establish a second migration route, this time in the eastern U-S... from Wisconsin to Florida. Joan Guilfoyle is an external affairs officer at the Minneapolis office of the U-S Fish and Wildlife Service. I asked her to describe what the birds look like: