Quote by Peter R. Grant
To summarize, the particular song a male sings, and the behavioral responses of females to song and morphological signals, are not genetically inherited in a fixed manner but are determined by learning early in life.
Summary
This quote suggests that a male bird's song and the way female birds respond to it are not determined by genetics. Instead, they are learned behaviors that develop early in life. This implies that these avian behaviors are not fixed or predetermined but can vary based on individual experiences and environmental factors.