Concur with that. The problem is in field shots the two features are hard to determine correctly.
I too thought it was prexaspes because
It led me to initially believe it was P. prexaspes because we have rarely seen P. iswara puddling in Singapore. But after looking at various field shots,
Without the benefit of the size, field shots of these two are very confusingly similar.
However, the presence of a red-ringed tornal HW black spot
Shot tis fella puddling but did not manage to get an underside shot.
Is this papilio iswara or papilio prexaspes?
The Blue Tit ♂ - Hypolycaena kina kina
The Tawny Mime - Papilio agestor agestor
The Tawny Mime - Papilio
Just few hours looking for an uncommon and with a very limited distribution and lifespan butterfly, the Orange Freak.
Found it with a