I guess it's a pretty common experience of childhood to find a sick or injured animal, a bird, say, and try to help it. Generally it dies. If you somehow manage to nurse it back to health, it flies or hops or scurries away, never to be seen again, quite probably just to die somewhere else, given its frail health. That's about the best outcome one can hope for, but it's still quite sad.
I imagine these sorts of experiences are less common today, with the elevated sense of danger apparently being instilled in kids now (the decline of trick or treating being the most obvious example), hard to say if that's good or bad, hard to say what exactly one learns from such experiences.
Poor, sick bird.