The Black Widow is characterized by dark coloration and black hair, and the females commonly have a red hourglass-shaped design on the underside of their abdomen. The male is considerably smaller than the female, and he has a body up to half an inch long. Black widow spiders are common around wood piles, and are frequently encountered when homeowners carry firewood into the home. They can also be found under eaves, in boxes, outdoor toilets, meter boxes, and other secluded areas.
The Brown Recluse spider is light to dark brown in color. They have a dark violin shaped marking, with the neck of the violin pointing toward the bulbous abdomen. The abdomen is covered with numerous fine hairs that provide a velvety appearance. The long, thin, brown legs also are covered with fine hairs.
The Brown Recluse can be found indoors and can live all year long in homes, barns, sheds, warehouses, and greenhouses. They are common in protected outdoor areas as well. Brown Recluses tend to hide during the day and hunt for insects including crickets, other spiders, cockroaches, and other insects. Females can lay many eggs at once, and the eggs can hatch in only a few weeks. Because of this buildings can become quickly infested with brown recluse spiders.
Spiders are generally good to have around, as they help minimize the population of harmful insects. The problem arises, however, when they negatively affect humans. Merely seeing a spider for some people is a traumatic experience. Aside from that, many spiders do bite humans and are poisonous.
Several spiders pose a serious threat to humans. The two deadliest to humans in the United States are the Black Widow and the Brown Recluse. People die each year from the bite of either of these two spiders so it is extremely important for any person who is bitten to seek treatment immediately. In some cases, hospitalization may be necessary.