Common Birdwing (Troides helena cerberus)
Pulau Ubin, 5th January 2018
- NParks Flora & Fauna Web
- Butterfly Circle
- Nature Society (Singapore) Butterfly List
- Butterflies of Singapore: Butterfly of the Month – January 2010: The Common Birdwing (Troides helena cerberus)
- Butterflies of Singapore: Life History of the Common Birdwing (Troides helena cerberus)
- Butterflies of Singapore: Birdwing Season in Singapore: Featuring the Common Birdwing (Troides helena cerberus)
- Butterflies of Thailand, Malaysia & Borneo
- SamuiButterflies.com
- A Check List of Butterflies in Indo-China
- Butterflies of India
- Butterflies of the Indian subcontinent
- India Biodiversity Portal
- Hong Kong Lepidopterists’ Society
- Butterflycorner
- ARKive
