The Habitat Foundation is pleased to support a research on the diversity of dragonflies and damselflies through our 2021 Research Grant. Dragonflies and damselflies are categorized under the order of Odonata and they are one of the least known species of Penang Island. This study aims to document the diversity of Odonata within the Penang Hill Biosphere Reserve and to produce an Odonata species list for the Biosphere Reserve.
Dragonflies and damselflies are charismatic representatives of insect diversity. They may look similar from afar with their slender bodies, big compound eyes and membranous wings, but each group has its own unique features that can easily tell them apart. Their iridescent wings and body that come in all shades of colour is what attracted Dr Choong Chee Yen in the first place to learn more about them.
Dr Choong Chee Yen, who is the Associate Professor at Universiti Kebangsaan Malaysia and also one of the leading experts on Odonata in Malaysia started studying dragonflies and damselflies since 2005. As a macrophotographer, he was drawn into the details of the Odonata and is mesmerized by their colours. His growing love for dragonflies and damselflies has driven his passion as a scientist to document the species diversity and he has since then dedicated himself to this field.
For this study, Dr Choong has made a few visits to several freshwater habitats within the study area to collect his samples. In determining the field sites, he takes into consideration different water bodies environments such as clean flowing water, brackish water, stagnant water and elevation. Thus far, he has collected about 40 species of dragonflies and damselflies and 7 new Odonata species were identified after cross-referencing with previously published records on Penang Island. These 7 species include:
| Scientific Name | Common Name | Location |
| i) Acrogomphus malayanus | Malayan Hooktail | The Habitat Penang Hill |
| ii) Leptogomphus risi | Ris’ Clubtail | Titi Kerawang |
| iii) Orthetrum luzonicum | Marsh Skimmer/ Slender Blue Skimmer | Tiger Hill |
| iv) Nepogomphus walli | Titi Kerawang | |
| v) Zygonyx iris malayana | Titi Kerawang | |
| vi) Coeliccia erici | Penang Botanic Garden | |
| vii) Echo modesta | White-faced Clearwing | Titi Kerawang, Moniot, Penang Botanic Garden |
Dragonflies and damselflies play an important part in our ecosystem. As some species depend on clean freshwater bodies for their life cycle, their presence has become synonymous with healthy ecosystems. Certain species only occur in clean flowing water while some can tolerate polluted water. Thus based on the species found, the water quality of that habitat can be determined. According to Dr Choong, the common green metalwing (Neurobasis chinensis) and common flashwing (Vestalis amethystina) are two examples of Odonata species for clean water bioindicators found on Penang Island.
By nature, dragonflies and damselflies are also good biocontrol for pests. Long existed since millions of years ago, the Odonata has evolved to be carnivorous. The flying adults eat mosquitoes and other insects while their larvae or nymphs also feed on mosquito larvae, tadpoles and even small fishes.
Through this study, we hope to gain more insights into the health of aquatic ecosystems on Penang Island and to further showcase dragonfly watching as a new area of specialty ecotourism in Malaysia.
