What kind of bird is this? Like a sparrow, smaller.

This is a young Chinese Pulsatilla. Pulsatilla chinensis can be fed with a powder as a regular feed, such as mixing corn flour, peanut rice flour and cooked egg yolk at a ratio of 5: 2: 3, or feeding some chin powder (mung bean powder, corn flour, cooked egg yolk, freshwater fish powder or silkworm pupa powder at a ratio of 5: 2: 2: 1); Always add some fruits and insect larvae and pupae.