Spiders are incredibly diverse invertebrate animals. With approximately 42,000 species within 110 different families identified worldwide, spiders are an incredibly diverse group of invertebrate animals. Of these, approximately 3800 species within 68 families are known to inhabit North America (Bradley 2012).

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Animal Index

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Other North Carolina spiders

Index of North Carolina Foliage Hunter Spiders

Index of North Carolina Funnel Web Spiders

Index of North Carolina Ground Hunter Spiders

Index of North Carolina Jumping Spiders

Index of North Carolina Mygalomorph Spiders

Index of North Carolina Orb Weaver Spiders

Index of North Carolina Space-filling Web Builder Spiders

Overview of Spider Groups

Overview of Foliage Hunter Spiders

General Characteristics of Foliage Hunting Spiders

  • These spiders hunt in vegetation, like bushes and trees.
  • Most are nocturnal, but the lynx spider species are diurnal.
    • Nocturnal species hide in silken cocoons during the day (Bradley 2012).
  • Do not entrap prey in webs; actively hunt prey in vegetation.
  • Trail a single strand of spider silk behind as a safety or drag line (Bradley 2012).

Overview of Funnel Web Spiders

General Characteristics of Funnel-shaped Web Building Spiders

  • These spiders construct broad, flat sheet webs that narrow into a central tube; overall, the webs look like funnels.
  • The spiders lie in wait within the narrow, central tubes until prey wanders by.
    • Prey cause the delicate web strands to vibrate.
    • The waiting spiders sense the vibration and rush out to attack.

Overview of Ground Hunter Spiders

General Characteristics of Ground Hunting Spiders

  • Not associated with webs, not even silk drag lines used by other active hunting spiders.
  • Most species are nocturnal, but some large species are diurnal.
  • These spiders are active hunters, and course along the ground searching for prey.
  • Hunt by sight and launch very fast rush attacks against prey.

Overview of Jumping Spiders

General Characteristics of Jumping Spiders

  • Active, diurnal hunters that hunt by sight.
    • Their eye arrangement is distinctive.
    • Have huge, forward-facing anterior median eyes (AME), and a pair of smaller, forward-facing eyes positioned above and slightly to the side.
  • Attack prey by leaping, often from many inches away.
  • Before jumping, these spiders anchor themselves to the surface from which they jump with a single strand of spider silk for safety.

Overview of Mygalomorph Spiders

General Characteristics of Mygalomorph Spiders

  • Tend to be large-bodied spiders.
    • Tarantulas (which do not live in North Carolina) are mygalomorph spiders.
  • Considered to be the more ancient of the two spider infraorders (the second infraorder being Araneomorphae).
  • Have large, forward-facing chelicerae, tipped with fangs that fold parallel to each other.
    • Unlike spiders in Araneomorphae infraorder, which pinch their fangs together to bite, mygalomorph spiders rear up, flip their fangs forward, and stab downwards.
  • Have eight small eyes, two pairs of book lungs, and at least one pair of long spinnerets that extend past the abdomen (Bradley 2012).
  • Most live in burrows in the soil.

Overview of Orb Weaver Spiders

General Characteristics of Orb Weaver Spiders

  • These spiders are those that people traditionally think of when they imagine a “spider”.
  • Spin distinctive, circular webs from several different types of silk, produced by different glands.
  • An orb web consists of:
    • A frame of non-sticky silk strands that radiate from the center of the web, like the spokes of a bicycle tire.
      • The spiders anchor the frame strands on vegetation or other environmental supports, like buildings.
    • A central disk of sticky silk strands arranged in a spiral around a central hub and attached to the frame.
    • A central hub from which individual spiders hang patiently and wait for prey.
  • Prey collides with the sticky webs of the orb and become trapped.
    • The waiting spiders respond to the vibrations caused by the prey struggling against the web and pick their way across the orb to attack the trapped prey.
  • The sticky strands of the orb gradually dry out and become less effective at trapping prey.
    • Most species eat their webs and spin fresh ones on a regular basis.

Overview of Space-filling Web Builder Spiders

General Characteristics of Space-filling Web Building Spiders
  • These spiders build three-dimensional webs that are known informally as “cobwebs”.
    • Webs appear constructed of tangled strands that fill a space with criss-crossed silk.
    • Very effective at trapping prey.
  • Spiders lie in wait until prey collides with the web, then rush out to attack.
  • Cellar spiders are often found in dark, quiet, moist areas, even in homes and buildings.