LOL, that would be weird. Birds do sing though. The Nightingale is a prized song-bird, not only by humans, but I'm sure also by other Nightingales. However, pigeons and most other animals do (consciously?) select their mate by his symmetry and abilities to display his dominant status among his peers. A male peacock in full display is a awesome sight, which surely does not go unnoticed by a possible mate, and may well be causal to the production of dopamine in the female. There is clear evidence that even birds select or reject possible mates based on physical properties and abilities, i.e. being desirable or unsuitable.