What is a characteristic feature of black widow spiders?

Black widow spiders are known for their shiny black abdomens, which is a distinct characteristic that sets them apart from many other spiders. This glossy appearance contributes to their easily recognizable nature. The black coloration serves as a warning signal due to the spider's venomous bite, which is more potent than that of most other North Carolina spiders.

While other features, such as the hourglass marking on the abdomen, are also significant for identification, the overall visual impact of the shiny black abdomen is particularly striking and is one of the first features noted by those familiar with the species. The unique coloration helps in education and warning about the dangers posed by these spiders in their natural habitat.