Hello people,i will talk about black widow

The American black widow (Latrodectus mactans) is a species of araneomorphic spider of the family Theridiidae.1 It is also known as the spider of wheat or spider capulina or black widow (in Mexico) and spider casanpulga (in El Salvador).
The female measures up to about 35 mm with extended legs, is bright black carbon and has a red hourglass patch on the underside of the abdomen. The male measures 12 mm and weighs 30 times less. The legs are large and each joint is orange brown in the middle and black at the ends. On the sides of the abdomen there are four pairs of red and white stripes. The combination of red and black colors is interpreted as a warning coloration (aposematism).

Young young are orange, brown and white; they acquire their black color with age, or with each change.