Thanks, Guy - it looks like no contest. I'll let you know when I hear back from Dr Seow.
I went again to the bit of scrub where I found the Mango Hawkmoth, to find a fine male Tawny Coster (
Acraea violae) aggressively protecting his territory. It chased off anything in its area, even Great Eggflies and Lacewings twice its size:
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Peacock Pansies (
Junonia almana) were also fairly common.
We took a trip out into the Mekong Delta, where we landed on a small island. There, I watched several pairs of Common Palmflies (
Elymnias hypermnestra) performing their mating ritual. They flap lazily around one another, hardly moving laterally at all. This behaviour seems interminable - I followed one pair for 25 minutes without sign of either landing! Eventually, I found a singleton on a low shrub:
The highlight was a couple of Lime Butterflies (
Papilio demoleus), taking salts from a grubby bit of concrete. These butterflies are normally very difficult to approach, but eventually one landed just in front of me and spread its wings beautifully:
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A very pleasing end to an interesting holiday

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Tony M.
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