Saturday, November 17, 2012

Black Widow Spider


Animal You | Black Widow Spider | Not all adults have black widows, the red hourglass on the bottom or top of a pair of ventral abdominal some red spots or have no marking at all. Black widows are often several red marks on the back or upper abdomen, usually two red spots. Adult male black widows are half the females and are often gray or brown instead of black and red, even though it may sometimes an hourglass marking on the ventral part, it is usually yellow or white, not red targeted variation of the type and the sex is great, a spider with a red hourglass or a pair of large round red spots on the abdomen waist with a contrast glossy black body, an adult female black widow.

Spiders of the genus Steatoda (also Theridiidae family) are often confused with the widow, and are known as "false widow" are much less harmful to humans. The spider hanging upside down often near the center of its web and waits for insects and jam odd. Then, before the insect can not escape the spider rushes to bite and wrap it in silk. The lower abdomen many other widows model on a red light or dark black background, which serve as a warning.

In North America, the Black Widow is commonly known as southern (Latrodectus mactans), western (Latrodectus Hesperus) and northern (Latrodectus variolus) in the United States as "gray" or "black widow" (Latrodectus geometricus) and "red widow" ( Latrodectus bishopi). African species of this kind are also known as button spider.
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