How do I usually recognize the man or doll?

Recognizing gender: male and female
For many canary breeders, identifying the gender is usually quite easy. The color or inheritance often gives a good indication. Yet even experienced growers can make mistakes — it's happened to me myself. It is most difficult just after the moult; gradually the distinction becomes clearer. One of the most useful methods remains whistling, although it is not foolproof: sometimes a doll also plays along. In this article I provide a number of useful points of reference.

Separating birds after breeding