Thomisidae
Color: Various colors, including white, yellow, brown, and green
Size: Adults are typically 0.1 - 0.4 inches in length
Shape: Small body with long, crab-like legs that extend to the sides
Crab spiders are small arachnids known for their crab-like appearance and ability to walk sideways. They are named for their resemblance to crabs and are often found in gardens and on flowers, where they hunt for prey.
Crab spiders live in various habitats, including gardens, forests, and meadows. They are commonly found on flowers, leaves, and stems, where they camouflage themselves to ambush insects. Indoors, they are rarely seen but can sometimes be found in potted plants or near windows.
Crab spiders eat a variety of insects. They are predators and wait patiently on flowers or leaves to catch bees, flies, butterflies, and other small insects. They use their strong front legs to grab their prey and inject venom to immobilize it.
Crab spiders are known for their sit-and-wait hunting strategy. They do not build webs to catch prey; instead, they rely on camouflage and quick movements to ambush insects. These spiders can walk forwards, backwards, and sideways, like crabs.
The female crab spider lays eggs in a silken sac, which she attaches to leaves or other surfaces. She guards the egg sac until the spiderlings hatch. The young spiders go through several molts before reaching adulthood.
Crab spiders are generally beneficial predators that help control insect populations. If you need to control them, inspect your garden and remove any webs or egg sacs you find. Reducing the number of plants and flowers near your home can also help keep them outside.
Crab spiders are not harmful to humans. They do not bite unless provoked and their venom is not dangerous to humans. These spiders can actually be beneficial by reducing the number of pest insects in gardens. Keeping your garden well-maintained can help manage their population.
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