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Spiders are the most abundant predatory natural enemies in terrestrial ecosystems, and their role in maintaining the stability of agroforestry ecosystems cannot be ignored. The body is 1 to 90 mm long, and the body is divided into two parts: the chest (precursor) and the abdomen (rear body). The head and chest are covered with carapace and chest. There are two pairs of appendages on the head and chest. The first pair is a cheek, with a chewing tooth and a toxic gland opening at the tip of the stalk. The scorpion of the scorpion scorpion moves forward and backward, and the lateral movement and the relative movement of the scorpion scorpion; the second pair For the limbs, the female spider and the immature male spider are step-footed to hold the food and make the sensory organs; but in the male spider's limb, the distal extremity enlarges and becomes the junction of the sperm. Spiders mostly feed on insects, other spiders, and multi-footed species, and some spiders also feed on small animals. The jumping spider has good vision and can capture prey in 30 cm.