Regal jumping spiders in a courtship display before mating
FLPA/Alamy
Jumping spiders seem to be able to tell each other apart, putting them among just a few other invertebrates that are thought to have this skill.
Recognising individuals within your species is important for social animals, such as primates, but just a handful of invertebrates have been observed to have this recognition, for example Northern paper wasps (Polistes fuscatus). This is thought to help with social cohesion within the insects’ colonies.