meaning - What's the difference between 'shot' and 'shot at'?

There are two sentences like this.

1. The hunter shot at the bird.


2. The hunter shot the bird.

Maybe I think that 'shot at' in number 1 sentence means that the hunter shot the bird but missed it. whereas hunter in number 2 sentence succeeded. What's the difference between 'shot' and 'shot at'in meaning? Please, tell me the difference.