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Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, [citation needed] is a venomous species of spider in the genus Latrodectus. The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mates after reproduction.
The eye arrangement of spiders in the genus Latrodectus. Female widow spiders are typically dark brown or a shiny black in colour when they are full grown, usually exhibiting a red or orange hourglass on the ventral surface (underside) of the abdomen; some may have a pair of red spots or have no marking at all.
The redback spider (Latrodectus hasselti), also known as the Australian black widow, [2] [3] [4] is a species of highly venomous spider believed to originate in Australia but now, Southeast Asia and New Zealand, it has also been found in packing crates in the United States with colonies elsewhere outside Australia. [5]
What they look like: When a black widow spider bites, it typically causes a painful pinprick sensation. ... But these bites are typically not dangerous because these spiders are not venomous ...
Conversely, redback and North American black widows live in proximity with people and several hundred black widow bites are reported to Poison Control in the United States each year. Of the bites reported in the United States from 2001 to 2005, approximately 31% were treated in a health care facility, 0.5% had major complications, and none were ...
Here’s a full list of all venomous snakes, facts about each one and where they can each be found: Copperhead Appearance: Copperheads are typically three to four feet, and their coloration can be ...
Black widows sometimes have various marks on their back beside the red hourglass, including yellowish-orange shapes, two marks or a single dot, and their bodies are typically about a half-inch long.
Latrodectus mactans, one of several venomous North American black widows. Australian funnel-web spiders [4] (Atrax and Hadronyche spp.) Brazilian wandering spiders (Phoneutria spp.) All widow spiders (Latrodectus spp.), including the black widows, button spiders, Australian redback spider (L. hasseltii), and the endangered katipō of New ...