To acquaint ROC citizens with dragonflies, Chunghwa Post issued a series of postage stamps on the topic in 2000 and 2003 separately, and now it is following up with another set of four stamps and a souvenir sheet on paddy dragonflies. The designs of the stamps follow: (1) Crocothemis servilia servilia: Males have red bodies and obvious amber basal spots in their hindwings. Females have brown-to-dark-brown bodies with a white stripe on the back sides of their thoraxes between the wings. They can be found near rice paddies and ponds in the plains and other low-altitude areas throughout the island. (2) Orthetrum pruinosum neglectum: Males have olive color compound eyes, steel blue thoraxes, red abdomens and obvious dark brown basal spots in their hindwings. Juvenile males have yellowish-brown basal spots. Females have brown bodies without any markings, and as they mature, the coloration of their thoraxes darkens. They can be found near rice paddies and ponds in the plains and other low-altitude areas throughout the island.(3) Diplacodes trivialis: Males have light blue compound eyes, steel blue thoraxes with some black stripes, steel blue abdomens which turn black near their light yellow anal appendages. Females have light yellow bodies. They can be found in rice paddies and ponds in the plains and other low-altitude areas, sometimes even in dry riverbeds and near streams, throughout the island. (4) Orthetrum sabina sabina: Males have olive color compound eyes, yellow green thoracic frontal plates and black lateral thoracic stripes. Their abdomens are black with white markings and their anal appendages are white. There is no difference in the appearance between the two sexes. They can be found in rice paddies from the plains to mid-altitude areas throughout the island. Adults can often be seen in grassy areas farther from water.