Harvey Speckled Key Characteristics Overall colour is creamy white with cinnamon distinct speckles. Stag Young – 7.25kg to 10kg (16lb to 23lb) Mature – 10kg to 12.7 kg (22lb to 28lb) Hen Young – 3.6kg to 6.3kg (8lb to 14lb) Mature – 5.4kg to 8.1kg (12lb to 18lb) History A speckled turkey developed in the late 20th century by Mr. D. C. Harvey of Cornwall, England. Initially bred as a light commercial bird. Standard passed by Poultry Club Great Britain March 2016.