Today black widows most often are found around construction sites and trash piles. Look for them before you stick your hand in a pile of lumber and in the holes of cement blocks. Family values Spiders are loners. They don't even like other spiders, except perhaps for dinner. But they do take care of their young.
Most spiders carefully wrap their eggs in silk they produce from their own body.
Then they store the eggs in a dry place until they hatch in spring. Wolf spiders are the most caring of all. The mother stays with her eggs while they hatch. Then she carries the tiny hatchlings on her back until they get big enough to head out on their own. Female spiders have a reputation for killing the males, but most don't.