In “A White Heron,” how does Jewett use Sylvia’s interest in birds to advance the plot?

In “A White Heron,” how does Jewett use Sylvia’s interest in birds to advance the plot?

In “A White Heron,” how does Jewett use Sylvia’s interest in birds to advance the plot?
In “A White Heron,” how does Jewett use Sylvia’s interest in birds to advance the plot?