How do you tell the age of a baby Mallard?

To determine the age of a baby Mallard, observe the plumage and size. Newly hatched ducklings are covered in soft down feathers, primarily yellow and brown, and are quite small. As they grow, their feathers become more defined, and they start to resemble adult ducks within 50 to 60 days. Additionally, older ducklings will exhibit more distinct coloration and patterns compared to their younger counterparts.