Black widows are carnivorous bugs that prey on various insects. More specifically, the diet of a black widow is known largely to include beetles, grasshoppers, caterpillars and flies, in addition to other members of the arachnid family. Female black widows are even known to eat male black widows.
Black widows are able to secure much of their food sources through trapping them in their webs. The female black widows have a habit of hanging upside down in the web until food comes along. Black widows contain a special kind of enzyme that is used to turn prey virtually into liquid form. Black widows are regarded as one of the most poisonous spiders in the world, but rarely seriously injure humans. These spiders have a large geographic span that includes all of the United States among their territories.