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A male Eresus sandaliatus. Sexual selection in spiders shows how sexual selection explains the evolution of phenotypic traits in spiders.Male spiders have many complex courtship rituals and have to avoid being eaten by the females, with the males of most species surviving only a few matings and consequently having short life-spans.
This provides the spider with excellent binocular vision and particularly good depth perception, which is vital for the strategies used by this species to hunt prey. [4] Maratus griseus are generally brown or black, with the male more often presenting a darker colouration. [5]
Like most arachnids, spiders have internal fertilization by indirect sperm transfer. The tubular testes of a male spider, which produce sperm, are located in the abdomen. [16] Sperm is exuded from the gonopore (genital opening) of the male and deposited on the top surface of a small "sperm web", constructed for this sole purpose. The male moves ...
The Australian Reptile Park recently recorded its largest male funnel-web spider yet, CNN reported. According to the zoo, which is located north of Syndey, Australia, the spider measures a ...
Spiders inside your home were likely born there, according to Terminix, meaning a female spider might've placed one of her egg sacs in an undisturbed area of your home, like crawl spaces, storage ...
Because they are able to tell the sexes apart, it is assumed the blood scent is mixed with pheromones. [35] Spiders also have in the joints of their limbs slit sensillae that detect force and vibrations. In web-building spiders, all these mechanical and chemical sensors are more important than the eyes, while the eyes are most important to ...
American House Spiders . American house spiders are also very common and harmless. They have a widow-like shape and are a light brown and gray color. Less common spider in WA. Western WA Black ...
Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male spiders have specialized pedipalps that are used to transfer sperm to the female during mating. Many species of spiders exhibit a great deal of sexual dimorphism. [1]