Birds chirp to indicate danger, warning and communication. Both male and female birds can chirp. The singing of birds is quite sweet and agreeable, often with a melodious tone. … It’s the signal of a male bird to seek for spouse after occupying a territory.
Why do birds chirp at 3am?
For many years, the prevailing theory was that those early hours are typically the coolest and driest hours of the day which allowed bird songs to travel the farthest, giving their voices better range. It’s sending a message to other males that they should stay away…and the farther away the better.