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Thai Cruiser feeding on poinsettia flowers

I came across these butterflies feeding on poinsettias in early November (2013) when I visited the headquarters of the Doi Suthep-Pui National Park, Chiang Mai, Thailand. The butterfly is the Common Cruiser (or Thai Cruiser) Vindula erota erota Fabricius, 1793 (female). This species, especially the female, exhibits seasonal variation, and this is the dry-season form, even though the photograph was taken early in the dry season on 6th November 2013.

Common Cruuiser (Vindula erota erota) female feeding on poinsettia
Common Cruuiser (Vindula erota erota) female feeding on poinsettia

The butterflies were very active in the bright morning sunshine, flying between different flowers, as this photograph shows (albeit a bit blurred!).

Common Cruuiser (Vindula erota erota) female taking off from a poinsettia flower
Common Cruuiser (Vindula erota erota) female taking off from a poinsettia flower

The red leaves of the poinsettia are in fact bracts; the flowers are quire small and grouped together as a cluster (or inflorescence) known as a ‘cyathium’ (plural cyathia). See: http://www.euphorbiaceae.org/pages/about_euphorbia.html. The main feature of interest to butterflies is the mouth-like nectar gland which if found on the side of each cyathium. These little yellow cups contain nectar, and the butterflies can be seen inserting the proboscises into them in the next two photographs.

Common Cruuiser (Vindula erota erota) with proboscis inserted into cup-shaped nectar gland
Common Cruuiser (Vindula erota erota) male with proboscis inserted into cup-shaped nectar gland

Common Cruuiser (Vindula erota erota) Chiang Mai

The butterflies were also feeding on lantana flowers, inserting their proboscis down into the tiny florets.

Common Cruuiser (Vindula erota erota) female feeding on a lantana floret
Common Cruuiser (Vindula erota erota) female feeding on a lantana floret

Interestingly, I did not see any of the more colourful, orange-brown males; where were they? Perhaps off mud-puddling somewhere in search of salts to boost their prowess when it came to reproducing with these lovely ladies!

rcannon992 View All

I am a retired entomologist with a background in quarantine pests and invasive invertebrates. I studied zoology at Imperial College (University of London) and did a PhD on the population dynamics of a cereal aphid (Metopolophium dirhodum) in the UK. I spent 5 years with the British Antarctic Survey studing cold hardiness of Antarctic invertebates and 17 years with the Food and Environment Research Agency. My main interests now are natural history, photography, painting and bird watching.

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