After mating, the spider that eats the male spider, the Black Widow Spider
Black Widow, a genus of spiders in the family Bulbophyllaceae, is found throughout the world, and its name comes from the fact that females tend to eat males after mating. The Black Widow is black, shiny, and its ventral surface has a more vivid hourglass-shaped pattern.
The body of this poisonous spider is about 2.5 cm long. The male's body shape is only 1/4 of the female's, because the male is often eaten by the female after mating, so it is rarely seen. In addition to the hourglass pattern, the male has 4 pairs of light red stripes on the flanks of the abdomen.
When you are bitten by a female Black Widow spider, your risk of death is only five percent. Despite mild bites, their toxicity directly affects the central nervous system and muscle tissue. Toxins directly stimulate your "oversensitive" central nervous system and bring about some other unpleasant side effects.
Black Widow's venom is 15 times more powerful than the Steppe Rattlesnake. However, the amount of secretion is small, so that the fatality rate is slightly lower. Its spider silk strength exceeds all known natural fibers, even the steel wire and Kevlar fibers known for their toughness are beyond the reach, and its toughness can extend by 27% on the forefoot and more than 2 times the strength of ordinary spider silk.
Black Widow's net is large, funnel-shaped in the middle. Female spiders lay several flocks of eggs in the summer, with egg sacks hanging from the net, white or brownish yellow, paper-like texture, up to 12 cm (0.5 inches) in diameter, containing 250 to 750 eggs. Like most spiders, they generally feed on a variety of insects, although occasionally they also prey on lice, horses, mosquitoes, and other spiders.
When the prey is entangled in the net, the black widow spider quickly attacks from the perch, wraps the prey securely with a tough web, and then pierces the prey and injects toxins. The toxin takes effect in about 10 minutes, during which time the prey is always tightly held by the spider. When the activity of the prey stops, the spider injects digestive enzymes into the wound. Bite a small hole in the worm to suck its bodily fluids. Predators include mud bees, parasites, and predators.