Ceylon became a republic within the British commonwealth on 22nd May, 1972 and changed its name to Sri Lanka.
Image above right, Complete set of the birds issue, 4th release of the series.
Image below left, Complete set of the resident birds of Sri Lanka, 2003. 25 stamps in the set.
Do feel free to add your thoughts, comments or suggestions
NOTE: Please click on the images for a larger view / closer look.