Meaning: This means there was a bird in a tree that was singing a happy song.
Choice of Words: "Small" indicates the size of the bird, "bird" is a general term for a feathered creature, "chirped" refers to the sound made by the bird, "happily" describes the bird's emotional state, "in" specifies the location of the bird, and "tree" is a tall woody plant with branches and leaves. Together, these words create a charming image of a contented bird singing in its natural habitat.