Title Jumping Spiders Use Image Defocusing For Depth Perception
The experiment was one of those experiments that is elegant in its simplicity. When using just green light to illuminate prey, the spiders were always accurate in their strikes, just light in full spectrum light. However, when green light was excluded and red light exclusively was used to illuminate prey, the spiders attacks on prey were typically short.
Comments: While nominally about how spiders hunt, we were interested in this article for the information contained on how the eyes of one particular species have evolved to take advantage of different spectrum within the light we see and how they are disadvantaged when even one colour is removed from their available light spectrum. And to think we see all those options as simply white.