Scientific name: Hydrobasileus croceus

Habitat: Pond

Body length: 47-54 mm

Distribution in Hong Kong: widespread, e.g. Tsiu Hang, Tai Po Kau, Sham Tseng, Mui Wo

Flight period in Hong Kong: May to October

Identification features (male): 

1. Synthorax and abdomen yellowish brown

2. Apparent brown spots on anal base of hindwings

3. Apparent black spots on abdomen

Identification features (female):

1. Synthorax and abdomen yellowish brown

2. Apparent dark brown spots on the edge of wingbase of hindwings後3. Abdomen without apparent black spots