Harvestmen

Harvestmen are an order of arachnids in the class Arachnida, scientifically known as Opiliones.

Harvestmen are an order of arachnids in the class Arachnida, scientifically known as Opiliones. They are often mistaken for spiders, but they are a distinct group with a fused-looking body, long legs, and no silk or venom glands. Harvestmen are widespread, mostly harmless to humans, and many species are omnivorous scavengers or predators.

Classification and appearance

Harvestmen are arachnids in the order Opiliones. They are commonly confused with spiders, but they are a separate lineage with a compact, fused body shape and very long legs. They have eight legs, but the body appears as one fused oval rather than two distinct segments.

Behaviour and diet

Most harvestmen are slow-moving and use touch more than vision to navigate. They may hunt small prey, but many species also scavenge dead animals and feed on decaying plant material and fungi. Their diet often includes small invertebrates, dead insects, plant matter, and fungi.

Habitat and distribution

Harvestmen are found in many habitats, including leaf litter, grass, foliage, logs, and tree trunks. They occur widely around the world and are especially common in humid environments. Harvestmen are common in Canada and are familiar to many Canadian readers as the small long-legged arachnids often seen in gardens, forests, and around homes.

Common names and human relevance

Harvestmen are known by several common names, including daddy longlegs and harvest spiders. They are generally harmless to people and may be beneficial in gardens because they consume small invertebrates. They do not produce silk and do not build webs, and they lack venom glands.