The visual acuity Portia, exceeds that of dragonflies. The human eye is only about fives times sharper than a jumping spider's. They achieve this by a telephoto-like series of lenses, a four-layer retina and the ability to swivel their eyes and integrate images from different stages in the scan. The downside is that the scanning and integrating processes are relatively slow. They can see as clearly as a pigeon, but only a minute piece at a time. They are, for example, unable to discern the shape of a praying mantis, because it is too big for its field of vision.
 

Portia  spider feeds on other spiders (araneophagic).

They are remarkable for their hunting behaviour which suggests they are capable of learning and problem solving, traits normally attributed to much larger animals.