Innate vision-based aversions to model and mimic were investigated using a mimicry system in which the models were ants (Formicidae), and both the mimics and the predators were jumping spiders (Salticidae). Jumping spiders are a large group of predatory invertebrates that usually prey...

Earlier studies have shown that Cosmophasis umbratica, a jumping spider from Singapore, is sexually dimorphic in the reflectance of ultraviolet (UV) (males, but not females, have UV-reflecting markings). Here we present the first experimental evidence that the male's UV markings influence mate...