Southern black widow (hatchling)

Description:

The southern black widow is one of the most common of the native widow spiders. It is the epitome of the classic widow spider, occurring in all the normal widow spider habitats. • Female: The adult female black widow spider has a glossy jet black color all over, including body and legs. The only red marks are the bright red hourglass mark on the underside of the abdomen, and a red spot just behind and above the spinnerets. The hourglass marking consists of two connected red triangles on the underside. Note, however, that the hourglass color may range from yellowish to various shades of orange or red. If the hourglass marking is not connected (e.g. - two distinct, non-touching triangles), it is most likely the northern cousin (L. variolus) of the southern black widow (L. mactans) • Males: Adult males are harmless, is 3-5 mm long with an elongated abdomen. The male’s legs are larger than the female’s and each joint is orange brown in the middle and black on the ends. On the sides of the male’s abdomen there are four pairs of red and white stripes. • Immatures: Newly hatched spiderlings are predominately white or yellowish-white, gradually acquiring more black and varying amounts of red and white with each molt. Juveniles of both sexes resemble the male and are harmless. The web is typically a 3-dimensional, unorganized mass of silk spun in a dark crevice or corner. The web is sticky, and very strong. If the web is active (in use), the female will be in or very near the web. (information from BugGuide)

Habitat:

Found outside a building, low to the ground. There is a wooded area nearby.

Notes:

This is one of about a dozen spiderlings that are hanging out together in a web that holds two males of the same species. The female is nearby and has already created her second known egg sac of the season. These are most likely part of the first clutch of eggs.