The students of Biology education of Yogyakarta State University were interested to create a learning module of  the dragonflies in coastal areas of Java Sea, 45 miles from Jepara City. They are Tria Septiani Subagyo, Setyo Sulistyono, Febrina Suci Wulandari and Benny Ari Kusuma.

Tria said that the research was aimed at recording dragonfly species (Odonata) in Karimunjawa Islands and the condition of the environment. Thereafter, the result was presented in a learning module.

Tria explained that it was found 1,251 dragonflies from 23 species of them. They are the families of Coenagrionidae (5 specieses), Libellulidae (16 specieses), Platycnemididae (1 species) and Protoneuridae (1 species).

 “Based on climatic and edaphic factors in Karimunjawa Island, the abiotic environment is in the good condition for dragoflies in the island,” said Tria. In her observation, the approximate air temperature was30.77°C, the approximate light intensity is 538.57x100 lux, the approximate air-speed velocity is 1.83 m/s and the approximate relative humidity is 78.73. In addition, pH of water is 6.67 and the soil Ph is 5.61.