The Question and Answer section for A White Heron and Other Stories is a great resource to ask questions, find answers, and discuss the novel.
Sylvia is surprised, then wary, when a stranger approaches. Sylvia later becomes interested in the young man: it is a mild sexual awakening. By the end of the story Sylvia refuses to betray the bird for the young man's affections.
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Sylvia does not give the young man the information on the heron. She values nature over the young man's attention.
The resolution is when Sylvia realizes that her love and connection with nature is stronger than external validation or the attention of a young man.