Scientific name: Diplacodes nebulosa

Habitat: marsh, pond

Body length: 21-22 mm

Distribution in Hong Kong: Mainly in north New Territories, e.g. Luk Keng, Long Valley

Flight period in Hong Kong: May to November

Similar species: Blue Percher (Comparison: female)

Identification features (male):

1. Synthorax, leg, abdomen deep blue

2. Brown spot on wingtip

Identification features (female): 

1. Synthorax and abdomen yellow, with black stripes

2. M-shaped spot on dorsum front of synthorax 

3. Very small amber spot on wingbase of hindwings

4. Anal appendage white