Common house spiders are small arachnids often found in homes. They typically have long legs and a variety of colors, including brown, gray, and black. These spiders prefer dark, undisturbed areas like corners, basements, and attics. They help control pest populations by preying on insects. Most common house spiders are harmless to humans and do not pose a significant threat. They build webs to catch their prey, which includes flies, mosquitoes, and other small insects. While some people may fear spiders, they play an essential role in maintaining a balanced ecosystem within our homes and gardens.