Jezebels with gorgeous warning colours

These delightfully coloured, red, yellow and black Delias species – such as the Red-spot Jezebel (Delias descombesi descombesi) (above) – are widely thought to be poisonous, or at least unpalatable, and the colour patterns are therefore aposematic, i.e. a warning signal to potential predators. I was surprised therefore, to discover that until recently, the evidence…