Key Facts
• The smallest dragonfly in Japan, the Scarlet Dwarf, is emerging in Wakayama.
• Found in Shingu City wetlands, it measures approximately 2 cm in length.
• Males are bright red, while females have yellow and black striped patterns.
• The Scarlet Dwarf is widely distributed from Southeast Asia to the Southern Hemisphere.
• Japan marks the northernmost habitat, with sightings in Shingu City and Kozagawa Town.
• Known for its vivid appearance, it is also called “Koakane.”
• Suitable wetland habitats in Japan are decreasing, leading to population decline.
• The emergence period continues until early July.
Summary
The Scarlet Dwarf, Japan’s smallest dragonfly at about 2 cm, is currently emerging in the wetlands of Shingu City, Wakayama Prefecture. Males display a striking red color, while females feature yellow and black stripes. This species, also known as “Koakane,” is found across Southeast Asia and the Southern Hemisphere, with Japan marking its northernmost range. However, the decline of suitable wetland habitats in Japan has led to a decrease in their population. The emergence period is expected to last until early July.
