Many, but not all, species of spiders are nocturnal, meaning they are most active during the night. The darkness provides them with protection from predators and also makes it easier for them to catch their prey.

However, there are also diurnal spiders, which are active during the day. Jumping spiders are a common example of diurnal spiders. They have excellent vision and rely on sight to hunt their prey, which makes them more suited to daytime activity.

It’s also worth noting that some spiders can be active at both day and night depending on the availability of prey, environmental conditions, and other factors. The behavior can vary greatly between different species and even among individuals within a species.