Redback spider

The redback spider (Latrodectus hasselti) is a venomous widow spider native to Australia. Females commonly have a red stripe or hourglass marking on the abdomen.

Latrodectism: A syndrome caused by bites from widow spiders, including severe pain and autonomic symptoms. Redback venom can produce this characteristic syndrome in humans.
Redback spider bite: An envenomation caused by a redback spider, often producing local pain and sometimes systemic symptoms. This is the medical consequence most directly associated with the species.
Latrodectus: A genus of widow spiders that includes species with medically significant venom. The redback is one species within this genus.
Australian redback spider: A common name for Latrodectus hasselti, the widow spider native to Australia. This common-name variant identifies the same species, rather than a separate spider.
Spider silk: A protein fiber spun by spiders for webs, egg sacs, and other structures. Redbacks use silk to build irregular webs that entangle prey.
Redback spider antivenom: An antibody treatment developed to neutralize toxins in redback spider venom. It has been used in Australia for severe or persistent redback envenomation.
Theridiidae: A large family of spiders known as comb-footed or tangle-web spiders. Redbacks belong to this family of irregular-web builders.
Latrodectus katipo: A New Zealand widow spider closely related to the redback. Its resemblance and close relationship make it a useful regional comparison.
Sexual cannibalism: The consumption of a mating partner by another member of the same species. Female redbacks sometimes consume males during or after mating.
Spider bite first aid: Immediate care for a suspected spider bite while assessing symptoms and arranging medical help. Guidance distinguishes redback bites from bites requiring pressure immobilization.

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