The redback spider is one of only two animals known where the male has been found to actively assist the female in sexual cannibalism. In the process of mating, the much smaller male somersaults to place his abdomen over the female's mouthparts.

2025年1月23日 · Males often have white markings on the upper side of the abdomen. They further differ in appearance from females in size, measuring about 3 to 4 mm (0.12 to 0.16 inch) in body length, compared with 1 cm (0.4 inch) in females. Males also are shorter-lived, surviving several months to the females’ two or three years.

2025年1月23日 · Female redback spiders are about 0.4 inches (10 mm), while male redback spiders are much smaller, only about 0.11 to 0.16 inches (3 to 4 mm). Female redback spiders are easy to identify by their shiny black bodies, slender legs and iconic red stripe running down their abdomen. In some cases, this stripe may be broken or absent, but most females ...

Female redbacks are also the gender considered most dangerous, with male spiders only measuring in at about 3mm, with fangs too small to penetrate the skin. Males have a light brown body with white markings on the upper side of the body …

2023年12月31日 · Size: Female redback spiders are around 0.39 inches (0.99 cm), and males are smaller, measuring 0.11-0.15 inches (0.27-0.38 cm). Color: Females have a black abdomen with red or orange vertical stripes from top to bottom. The underside of the abdomen has red streaks, resembling a silhouette of an hourglass. The cephalothorax is black.

2024年11月25日 · What is a Redback Spider? The redback spider is a small, black arachnid characterized by a red or orange stripe running down the back of the female. It is renowned for its venom, which can cause severe symptoms in humans. Found in urban and rural areas, these spiders construct irregular webs in sheltered locations.

2016年3月10日 · Females of the species tend to be larger than the males, with a body length of about 1 cm compared to 3–4 mm for males. Adult females are jet black (with a red stripe), whereas juvenile females are generally brown with white markings. Males are normally light brown with white markings, but lack the distinctive red stripe.

2017年2月3日 · The male redback is substantially smaller than the female. Its body and legs are pale brown, and it has black and white markings on the top of its abdomen and a pale hourglass on the underside. The redback is a member of the Latrodectus genus. This group of closely-related spiders are known as ‘ widow spiders ’.

Males are much smaller than females at 4mm (0.16in) and typically live on her web. They are light brown or black with white stripes on their body and small red markings. On their underside the hourglass marking is pale. The redback spider is a carnivore. They feed mainly on insects which are captured in the females web.