Scientific name: Rhyothemis triangularis

Habitat: marsh, pond

Body length: 25-28 mm

Distribution in Hong Kong: Widespread, e.g. Tai Po Kau, Sham Tseng

Flight period in Hong Kong: April to September

Identification features (male):

1. Metallic blue spot on wingbase

Identification features (female):

1. Metallic black spot on wingbase