Black Widow Spider Incubating 01

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Black widows are small spiders have an unusually potent venom containing the neurotoxin latrotoxin, which causes the condition latrodectism, both named after the genus. Female widow spiders have unusually large venom glands and their bite can be particularly harmful to large vertebrates, including humans. However, despite the genus' notoriety, Latrodectus bites are rarely fatal or even produce serious complications. Only the bites of the females are dangerous to humans.
The prevalence of sexual cannibalism, a behavior in which the female eats the male after mating, has inspired the common name "widow spiders". This behaviour may promote the survival odds of the offspring; however, females of some species only rarely show this behavior, and much of the documented evidence for sexual cannibalism has been observed in laboratory cages where the males could not escape. Male black widow spiders tend to select their mates by determining if the female has eaten already to avoid being eaten themselves. They are able to tell if the female has fed by sensing chemicals in the web. Black widow incubating was filmed by Heiko Kiera aka Ojatro in Florida in 2010. This stock footage is available at www.Ojatrovisuals.com.