Display multiple identical polygons (with different attributes) on map

Question

I need to create maps of multiple species in a certain area. However sometimes multiple species occurr in the exact same area. This results in two identical polygons on top of each other. Many of these polygons are for example a UTM1 square of 1 by 1 km.

When making a map I should be able to make it clear that there are multiple species that occur in that polygon. However through the syles menu I can only make the colors blend while ideally when 3 polygons are on top of each other I should get some sort of pie diagramm or a checkerboard pattern containing the colors of both species.

Does anyone know a plugin or elegant way to do this? So far I have only found stuff like the v.clean option, but I do not want to remove the overlapping polygons, quite the opposite, I want to visualise the overlapping polygons as well as the non-overlapping ones with a clear legend.

Answer 1

I have created 3 polygons called Deer Lions Bears, and used the Tranparency slider on the colour.

the transparent colours show which polygons overlap

Answer 2

Have you considered just adding own layers for regions where multiple species occur? For example, if you have the species A which is visualized green, and the species B which is visualized red, just make the regions where both of them occur blue. Might be a bit too simplistic, but it works in my mind.