South China Shadow-emerald

Scientific name: Idionyx claudia

Habitat: fast-flowing stream in mountainous forest, pool beside waterfall

Body length: 42-45 mm

Distribution in Hong Kong: Ng Tung Chai

Flight period in Hong Kong: May to July

Similar species: Dancing Shadow-emerald (Comparison)

Identification features: 

1. Legs all black

2. Dorsum of abdomen without vertical yellow stripe