The scientific name of the four happy birds is Magpie, which is also called pig excrement residue, cheep residue, faithful bird and four happy birds. It is a bird of the family Sparidae, with a body length of about 2 1 cm, a thick, healthy and straight mouth, a length of about half or slightly longer than that of the head, a convex tail, a tail almost equal to or slightly longer than the wings, a different feather color between the sexes, and a lively and active personality. It will sing on the branches or outside walls of buildings when it is happy, so it is called "four happy children" in mainland China.

Thrush is one of the top ten songbirds widely distributed in China, Central China, South China and Hainan. It is identified as a city bird in Guangzhou. It mainly feeds on insects, but also eats grass seeds and tsaoko. It can sing from morning till night during the breeding season, with a melodious, melodious and varied song.