Birds are known to sing in the morning as a way to communicate with other birds in their area. The morning is a prime time for birds to establish their territory, attract a mate, and warn other birds of potential dangers. Additionally, singing in the morning helps birds to mark their presence and establish their dominance in the area. The early hours of the day also offer ideal conditions for sound transmission, as the air is typically calmer and carries sound further, making it an effective time for birds to communicate through their songs.