See: Biosphere Reserve
Wikipedia currently contains lists for the following countries:
The complete list from the UNESCO Web site (as of January 2003), includes:
... 7 - Ralph Bunche[?], diplomat, winner of the Nobel Peace Prize April 16 - Fifi D'Orsay, actress (+ 1983) April 22 - Robert Oppenheimer, physicist (+ 1967) May 6 - ...