16. Listening for courtship songs.
3. Why and How Birds Sing
Courtship songs
From page 32 in the book.
Listening for courtship songs. As you become more familiar with songs of a particular species, be alert for how the male alters his songs if a female is near, especially if it is early in the nesting season before she has laid her eggs. At that time, when the male and female are still mating, special courtship songs can be heard.