Idioms such as singing and dancing of birds, singing of birds and fragrance of flowers describe that birds are good at singing and singing, so why do birds sing?
To be exact, birds are not singing, they are singing. So what is the purpose of birds singing?
Bird singing is actually the "language" of communication between birds and the way of transmitting information among birds. Birds sing especially vigorously in the morning and dusk. That's when they are announcing their territory to other birds and warning other birds not to approach or invade at will. During the breeding season, males often sing incessantly. Some are to demonstrate to male companions and compete for territory; Others are expressing love to the female to attract her attention and love.
Therefore, in addition to bright feathers, singing is often a way for birds to show off their courtship. Research shows that those males who sing loudly and have many songs have the advantages of high hormone level, strong immunity and good physical quality. They can be favored by females, so as to obtain the right of mating and realize the purpose of genealogy. With such benefits, no wonder birds sing so happily.