Blue Slate Turkeys are named for their ash blue coloring. Blue Slates - also called Blue or Lavender turkeys - can have a few black flecks on their feathering. Hens are lighter in coloring than toms. Like the Blue Andalusian, the blue gene can produce several colors: solid black, solid blue and blue flecked with black spots. Often Blue Slates are a combination of these colors. The babies are gray with brown tinges. The Blue Slate is a rare, Heritage breed fowl and a very old breed - recognized as a standard breed in the U.S. in 1874. These beautiful birds are medium-sized. Young toms will average 23 lbs., and young hens will average 14 lbs. | Murray McMurray Hatchery Blue Slate Turkeys Straight Run