Scientific name: Anax parthenope julius

Habitat: marsh, pond, slow-flowing stream

Body length: 68-76 mm

Distribution in Hong Kong: widespread, such as Long Valley, Hong Kong Wetland Park, Kai Kuk Shue Ha, urban parks 

Flight period in Hong Kong: March to December

Similar species: Pale-spotted Emperor, Blue-spotted Emperor (Comparison)

Identification features:

1. Two black stripes on the frons

2. Synthorax green, without apparent stripes on two sides

3. Inner edge of hindwing of both sexes smooth

4. Spots on abdomen strip-like

5. Second abdominal segment mainly in male, and either green or blue in female