From here you can go to the lists of all birds af all countries of the world
You can go to als birds by country through 10 regions:
All birds of America South
All East African birds
All birds of Australia and oceanic states
On the left border you can find the automatic links to 10 regions of the world. It may take a bit of searching before you will find the country of your interest.
You can also click on the country of your interest on this map of the world, which will help you get to the desirable list of all birds of the country of your interest. Also check out this Agricultural Portal.