There are different ways to tell the sex of a duck. Most are easy and can be completed through simple observation with minimal interaction with the duck. These things vary slightly depending on the breed of duck, but there are similarities that remain.
It is easiest to sex a duck starting at around 2 months of age, where the process can be done through listening and observation. Look at the feather colors, which are one of the most reliable means for telling the duck's sex. This method is most reliable when the ducks are full grown because ducklings' feathers change colors.
Males will have more vibrant feathers. Identifying features of male mallards are green heads and a white ring around the neck. These colors and patterns are used to attract females.
Female ducks are normally characterized as having a more neutral color to their feathers--normally brown. Listen to their quack because they might be telling whether they are male or female. By listing to the pitch and intensity of a ... more.
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