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The stamps in this series also feature some of the wildlife found in the MacRitchie catchment area. The first stamp on the left depicts the Colugo (Cynocephalus variegatus) or Malayan Flying Lemur. The second stamp features the Singapore Adenia (Adenia macrophylla var. singaporeana), a rare forest-edge species which is found in Chek Jawa and along the pipeline in the Central Catchment Nature Reserve. The third stamp shows the Red-Crown Barbet, a colourful bird named Megalaima rafflesii, after Sir Stamford Raffles. The final stamp features the Common Tree Nymph (Idea stolli logani), a large beautiful butterfly with a wingspan of about 180mm.