Ideopsis similis in Singapore?

I came across this blogsite showing Ideopsis similis (mis-IDed as I. vulgaris )in Changi Airport.
http://www.hpgrumpe.de/nahaufnahmen/...tterlinge.html
n
Ideopsis similis is very similar to I. vulgaris & often confused with it. Range: Mainland SE Asia ,an isolated population in Sri Lanka.
FW with the cellend spot less irregular ;discal spots larger & rounded ;HW with the inner marginal veins darkened narrowly (less so in the female).
Male Thailand.
http://www.samuibutterflies.com/02_i...lis/male.v.jpg
Male Southern Japan.
http://www.okinawa-kaeru.net/wild/in...gimadara-3.jpg
Female ;Hong Kong.
https://www.flickr.com/photos/43950086@N03/6298175341

Ideopsis vulgaris. Range Se Asia mainland & Sundaland.
FW cellend spot very irregular with a thin upper arm; discal spots narrow (elongate horizontally) HW inner marginal veins more broadly striped brown in both sexes.
Two males & one female , Singapore.
http://www.butterflycircle.com/check...drick%20Ho.jpg
https://3.bp.blogspot.com/-7X3PhsUVu...Tiger-KSK7.jpg
http://www.butterflycircle.com/check...obby%20Mun.jpg

Evans called I. similis the Blue Glassy Tiger (1928, 1932), at which time vulgaris was considered a subspecies.

It is more deserving of the name Blue Glassy Tiger as it is larger & bluer.
I came across one in the Damansara park which is in the Klang Valley 10 years ago, and was struck by its larger size & distinctly bright blue colour.
In contrast I. vulgaris appears dark & greyish blue.
It was also photograhed in Kuala Selangor in 2009.
A recent shot taken south of KL below is labelled I. vulgaris.
https://www.inaturalist.org/photos/13440873

As it feed on the same hostplant as I. vulgaris it is probably in Johor by now.

A posible explanation here is taht the shots are escapees from a nearby butterfly farm.


TL Seow: Cheers.
PS. I fail to see it is written the pix were taken in a butterfly garden. That explains the whole thing.