Can grass and birds digest itself?

Grass and sparrows are usually not digested by themselves.There are many types of birds, such as the core grass birds, spots, and black throat grass birds, but the life span is not long, and it can live about 7-10 years.No matter which one is small and cute.It belongs to small ring poultry, mainly distributed near the river of the Oceania, with a long and sharp tail, and a conical shape, which is very solid.