Males:
Mature males, also called drakes, typically weigh between 2 and 2.5 pounds (0.9 to 1.1 kilograms) and measure around 12 to 13 inches (30 to 33 centimeters) in length.
Females:
Mature females, also called hens, are slightly smaller than drakes, weighing between 1.5 and 2 pounds (0.68 to 0.9 kilograms) and measuring about 10 to 11 inches (25 to 28 centimeters) in length.