Today , I was presently surprised to find hundreds of Nacaduba biocellata(Two Spotted Line Blue) on the flowering Acacia auriculiformis on the Keppel Bay area.
This species was a recent discovery in Singapore and reported in the Blog article here and also during a survey of Pulau Semakau
Looks like this tiny blue is gonna be here to stay with plenty of its hostplant all over the island.