A first record of oviposition of Common Onyx Horaga onyx Moore, 1857 (Insecta: Lepidoptera: Lycaenidae) in Sri Lanka and its importance in conserving a highly threatened butterfly

Main Article Content

Chathura Udayanga Herath
Pavan Bopitiya Gamage
Iroshan Rupasinghe
Moditha Hiranya Kodikara Arachchi


Horaga onyx (Moore 1857) commonly known as Common Onyx or Blue Onyx is one of the rarest Lycaenid butterfly species found in Sri Lanka.  Only a handful of sight records are there of this butterfly and much of the biology of this butterfly in Sri Lanka has not been studied. Here we report the first record of this species ovipositing in Sri Lanka and first record of its host plant, Macaranga indica. 

Article Details

How to Cite
Herath, C.U., Gamage, P.B., Rupasinghe, I. and Kodikara Arachchi, M.H. 2020. A first record of oviposition of Common Onyx Horaga onyx Moore, 1857 (Insecta: Lepidoptera: Lycaenidae) in Sri Lanka and its importance in conserving a highly threatened butterfly. Journal of Threatened Taxa. 12, 1 (Jan. 2020), 15201–15204. DOI:https://doi.org/10.11609/jott.5443.12.1.15201-15204.


Chandrasekharan, V.K. (2019). Horaga onyx (Moore, [1858]) – Common Onyx. In: Kunte, K., S. Sondhi & P. Roy (eds.). Butterflies of India, v. 2.68. Indian Foundation for Butterflies. http://www.ifoundbutterflies.org/sp/973/Horaga-onyx. Accessed on 14 December 2019.

d’Abrera, B. (1998). The Butterflies of Ceylon. WHT, Colombo, 166pp.

Dassanayake, M.D. (eds.) (1997). A Revised Handbook to the Flora of Ceylon. Vol. 11. Oxford & IBH Publishing Co., New Delhi, 420pp.

Department of Meteorology, Sri Lanka (2019). http://www.meteo.gov.lk/index.php?option=com_content&view=article&id=94&Itemid=310&lang=en Accessed on 31 July 2019.

Gunatilleke, N., R. Pethiyagoda & S. Gunatilleke (2008). Biodiversity of Sri Lanka. Journal of the National Science Foundation of Sri Lanka 36 (Special Issue): 25–62. https://doi.org/10.4038/jnsfsr.v36i0.8047

Igarashi, S. & H. Fukuda (2000). The life histories of Asian butterflies. Vol. 2. Tokai University Press, Japan, 742pp.

IUCN & MOENR (2007). The 2007 Red List of Threatened Fauna and Flora of Sri Lanka, Colombo, 148pp.

MOE (2012). The National Red List of 2012; Conservation status of the Fauna and Flora, Ministry of Environment, Colombo, 452pp.

Jayasinghe, H.D., S.S. Rajapaksha & C. de Alwis (2014). A compilation and analysis of food plants utilization of Sri Lankan butterfly larvae (Papilionoidea). Taprobanica 6(2): 110–131.

Kasambe, R. (2016). Errata: Crassocephalum crepioides, and not Gnura cusimbua, possible new larval host plant of the Common Onyx, Horaga onyx from Southern Western Ghats, Kerala. Bionotes 18(4): 131.

MacKinnon, W. & L. de Nicéville (1898). A list of the butterflies of Mussoorie in the western Himalayas and neighboring regions. Part III. Journal of the Bombay Natural History Society 11: 585–605.

Moore, F. (1880–1887). The Lepidoptera of Ceylon, Vol. 1, 2 & 3. L. Reeve, London. pp.i–xii+1–190, pp.i–viii+191–353 & pp.i–xv+354–932.

Ormiston, W. (1924). The Butterflies of Sri Lanka, H.W. Cave & Co.,Colombo, 143pp.

van der Poorten, G.M & N.E. van der Poorten (2018). Field guide to the Butterflies of Sri Lanka. Lepodon Books, Toronto, 250pp.

Woodhouse, L.G.O. (1949). The Butterfly Fauna of Ceylon, 2nd Edition. The Colombo Apothecaries’ Co. Ltd., Colombo, 138pp.