What is the largest spider family by number of species?

Salticidae is the largest spider family by number of described species. Its members are the jumping spiders, a diverse group recognized for their compact bodies, prominent forward-facing eyes, and ability to leap at prey or away from danger.

Jumping spiders contain almost 700 genera and roughly 7,000 described species, though the exact total changes as researchers revise classifications and describe new species. Their abundance is reflected in their global distribution: they live in tropical forests, temperate habitats, deserts, mountains, and even high-elevation environments.

Their success is closely linked to vision and behavior. The large anterior median eyes provide sharp, narrow-field vision, while the other six eyes detect movement around the sides and rear. Most jumping spiders do not rely on sticky webs to capture prey; instead, they stalk and pounce, using silk as a safety line during leaps. Salticidae is often confused with Lycosidae, the wolf-spider family, which is also a major and visually oriented spider group but is not the largest.