Hong Niao and birds eat differently. The red indigo bird mainly eats insects and vegetables. Hong Niao mainly eats beans, not worms. Hong Niao scientific name swamp tits is a kind of small tits that Beijingers like to keep. The call is soft, the timbre is changeable and the sound is thought-provoking, which is also one of the important calls of many caged birds. Indigo blue, with red and blue, is the most popular elegant ornamental bird.