The United Nations has proclaimed 2010 as the International Year of Biodiversity. Therefore Hong Kong Post presents the commemorative stamp set of four special stamps featuring endemic species including the Hong Kong paradise fish Macropodus hongkongensis, Romer's tree frog (the smallest frog species found in Hong Kong), Sinopora hongkongensis (a plant first discovered in Tai Mo Shan which is new to science) and Fukienogomphus choifongae (a dragonfly first discovered in Wu Kau Tang which is also new to science).The stamps were issued on June 30, 2010.
Macropodus hongkongensis is a new species endemic in Hong Kong and should be treated as an endangered species. Compare with the related species Macropodus concolor, Macropodus hongkongensis have some discrepancies like the scale pigmentation, appearance overall, the pelvic fin rays .
