Let me get this out of the way first: seeing his clockwork parents after the bird being "fixed" was really disturbing, if the latter wasn't enough to make me feel that way. Anyhow:
Setting: Somewhere in the English countryside, especially around Stanley's house
Point of view: Third-person; no narration
Conflict: Protagonist vs. himself; he is afraid of going outside. The consequences count too.
Climax: The protagonist gives the now-clockwork bird back to the girl, who draws back and runs away.
Symbols: Stanley's house = his own comfort zone. In the same thread, Stanley's refusal to leave his house and routine could be thought of as something similar to an Oedipus complex.
Irony: Mr. and Mrs. Pickle turned out to be clockwork as well.
Theme: You cannot hold on to your past forever (?)
