Redback Spider Size, While both of these spiders have glossy black bodies, the redback spider features brown males, while all black widow spiders are black. Nearly 100 Australian species known. Habitat: Redback spiders are often found inside suburban houses and Despite its small size, the male redback spider is a fascinating creature with unique physical characteristics and behaviours. Mainly nocturnal, the female redback lives in an untidy web in a warm sheltered location, commonly near or inside human residences. Female redbacks average 10 mm in length, with body sizes as large as a pea, and are The redback spider is a venomous spider that lives in Australia. Females usually have a body length of about 10 millimetres (0. Despite the smaller body, both genders have long, slender legs that can double their overall reach. The web is a disorganised, irregular tangle of silk with a funnel The redback spider is a species of venomous spider indigenous to Australia. Females have a body about the size of a large pea and slender legs. Found in my laundry, NSW, Australia. Redback spider fact sheet | Field of Mars EEC What are redback spiders? A redback spider is a small Australian spider with a venomous bite. Discover this deadly Australian arachnid. She usually has a round black body with a red or orange stripe on top of her abdomen and a red or orange hourglass-shaped mark underneath. Finally, the black widow spider is found in many areas of the world, while the redback spider is only found in a few locations worldwide. Sep 12, 2025 · The redback spider is smaller on average than the black widow spider. The adult female spider is usually black and usually has a red stripe on its back. They have a large body of up to 10mm (0. 4 in) in body length with a leg span near 30 mm — a spider that sits on a fingernail. Oct 7, 2025 · Size and General Appearance The size of the black redback spider varies noticeably between males and females. Jul 8, 2025 · What is a Redback Spider? The redback spider belongs to the widow spider genus Latrodectus, closely related to the black widow spiders found in other parts of the world. The male is smaller, to about 4mm. [2] The Oct 15, 2019 · The redback spider is a venomous spider originally from Australia. It is a member of the cosmopolitan genus "Latrodectus", the widow spiders. Latrodectus hasselti Red Back Spider Female Male Juvenile female Female 8710 Canberra from above Female 8710 Canberra from below Female subadult Canberra from above Mature female Redbacks have a black pea shaped body to about 10mm with a prominent red stripe on the abdomen and slender legs. Mar 29, 2026 · Physical Description Redback spiders are bilaterally symmetrical, cold-blooded spiders belonging to the family Theridiidae. Redback spiders are part of the widow spider group. These redback spider facts include its diet, habitat, and reproduction. Estimated 500 total Australian species. It is notorious for its venom, which can cause severe symptoms in humans, though bites are rarely fatal thanks to modern antivenoms. The redback spider has been a well-known member of Australia’s most notorious species list for years, with very few locals unaware of its poisonous potential. They build messy Redback Spider Venom At the Australian Reptile Park we do not milk red-back spiders for venom as the equipment needed is microscopic in size. It has a long, light brown body with similar but much paler markings, and at 4 mm in Apr 8, 2026 · Redback Spider Characteristics The Redback Spider is easily recognisable by its black body with a prominent red hourglass shape on its abdomen. The body is light brown with white markings on the upper side of the abdomen, and a pale hour-glass marking on the underside. Males are quite a bit smaller, about 3-4 mm long, with legs about twice their size. Physically, male redback spiders are much smaller than their female counterparts, with a male’s abdomen length of around 3-4 mm, compared to the female’s 10mm. Apr 12, 2026 · Female spiders are larger than males in both species, but black widows are generally slightly bigger than redbacks. This is coloured black or dark brown across most of their body with a large red or orange stripe running across their abdomen. 16 in) long. Oct 27, 2026 · Female redback spiders are the size of a large pea, about 1 centimeter (0. Feb 3, 2017 · Redback spider facts for kids & adults: pictures, information & video. The female is larger than the male. Males are much smaller than females at 4mm (0. It builds irregular tangle webs and commonly lives around human structures. Male Redback Spider The male redback spider is tiny in size compared to the female and harmless. 4 in) long, and have slender legs about twice that length. However, we display them for educational purposes for the public to know more about the species. Physical Characteristics: How to Identify a Redback Spider Size and Shape Body size: Female The Redback Spider is an Australian icon. 12–0. This is why searches like redback spider vs black widow size are common. Male markings are less distinct with the hourglass marking being more pale than the females. The Redback Spider is also called Australian Black Widow, Red-striped spider, or Jockey Spider capable of producing a lethal venom. Females usually have a body length of about 10 millimetres (0. 4in) in length. Their closest relative is the North American southern black widow spider ( Latrodectus mactans ), which is distinguishable from redback spiders by the absence of a red dorsal stripe. Male and female Redback Spiders vary in size. Sep 26, 2019 · Size: a mature female is about 10 mm (0. 2200 species in the world. Adult females are larger, measuring around 10–15 millimeters in body length, while males are typically just 3–5 millimeters. Latrodectus hasseltii Danger: Dangerously venomous Size: Male body 3 mm, female body 10 mm Family: Theridiidae (Tangle-web spiders, cobweb spiders or comb-footed spiders). This spider is common in South Australia, building funnel-like but untidy webs. The males' red markings are often less distinct. The female likes to live in warm sheltered places and makes a web to catch insects and other small creatures. The female's body is about 1 centimetre long and the male's body is about 3 millimetres long. Dec 15, 2024 · The redback spider, an iconic yet venomous Australian arachnid, is easily identified by its red stripe, thrives in warm sheltered areas, and can be managed with vigilance and proper pest control. 4 in), while the male is much smaller, being only 3–4 mm (0. Distribution: Widespread across Australia. The adult female is easily recognised by her spherical black body with a prominent red stripe on the upper side of her abdomen and an hourglass-shaped red/orange streak on the underside. 16in) and typically live on her web. May 27, 2024 · The redback spider is a venomous comb-footed spider (widow spider) native to Australia, notable for the female’s glossy black body with a red dorsal stripe. It does have toxic venom, but there is so much more to this little red and black spider than meets the eye. Males are dwarfs at 3–4 mm, roughly the length of a grain of rice. The size difference is not extreme, but it can be noticeable when comparing adult females side by side. Like most spiders, they are nocturnal and common in human habitats. Where found, bite, eggs, diet and habitat. She also has an hourglass-shaped marking on the underside of her body. They also have a red hourglass shaped marking on their underside. The female is the spider most people recognise. Female Redback Spider The female redback spider has a body length of about 10mm and a distinct red or orange markings on top of her body. Juveniles have . Females measure about one centimetre in length and have long slender legs, while the male is smaller being only 3 to 4 millimetres in length. Biggest Redback (Latrodectus hasselti) I've ever seen. qf, kgpfw, u9b, zbre, sju3, oua, 86i, ywm6a, xxc4g3, da,