Striking butterfly that holds the record for most types of vision receptor cells of any insect.

Blue triangle butterfly - Graphium sarpedon s. choredon - Photo by Alex Pawlow

With 15 classes of photoreceptor cells, this butterfly is able to distinguish colour, brightness, movement and shape. The highest know number of photoreceptors in another insect is 9.

We think it is only fair that this butterfly is able to see so well, considering that it provides such a visual delight for us.

The Blue triangle is a species of swallowtail butterfly that inhabits lowland rainforest areas, often seen flying above the canopy.

It is also known as the Bluebottle, for its intense blue stripe offset by black.