Ideopsis similis persimilis

Moore 1879 - The Blue Glassy Tiger

Koh Samui and Koh Pha Ngan.

This is one of the commonest butterflies on Samui. It is very similar to Ideopsis vulgaris, the main difference being the shape of some of the basal spots in spaces 2 & 3 on the forewing, which, in I. similis are elliptical and I. vulgaris, wedge shaped. Also, the cell-end spot is only slighly outwardly indented in I. similis, but deeply indented in I. vulgaris.

It can be found anywhere on the islands except for in deep forests.

Flight Period



60 - 70mm

Early Stages

Fully known.

Larval Foodplant

Diplacosia glaucescens, Cocculus laurifolius (both Menispermaceae), Cryptolepis buchanani (Periplocaceae), Gymnema acuminata (Asclepiadaceae) and Parsonsia helicandra (Apocynaceae)


Sri Lanka, The Nicobars, Sumatra and S. China through to Thailand as far as Kedah, Malaysia