Songbirds are the birds with a beautiful voice. Different kinds of songbirds wake up at different times in the morning and begin to sing. This is because they have different waking clocks, according to the brightness of the sunlight.
We mostly hear bird concerts between spring and summer. This is the time when birds are looking for partners. Studies have shown that songs play an important role in attracting possible partners and may even show the health of the singer. Even after they have found a partner, male (雄性的) birds continue to sing, because it's a way of showing their babies how to sing.
Although baby birds know the songs they will sing as adults, true songbirds have to learn how to sing properly. Nestlings begin learning their songs by listening to adults around them. They go through several stages of learning, just like humans learning language. First, they practise voices and sounds, which is like the early stage in human language development. Then, during the second stage, the birds practise their songs for eight to nine months. The singing is improved a lot during the final stage with the help of their teachers.
Like humans, members of each kind of songbirds have their own dialects (方言). These are learnt from their parents when the birds are children.
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