Spiders found in California include 51 unique species from confirmed sightings by Featured spider picture of Latrodectus hesperus Western Black Widow ..
The brown widow spider Latrodectus geometricus , also known as the brown button spider, grey widow, brown black widow, house button spider, or geometric button spider, is an arachnid closely related to the deadly black widow Latrodectus macrons .What Does the Brown Widow Spider Look Like? The brown widow is a medium to large spider that is slightly smaller than its cousin, the black . Biological Hazards. Biological hazards include vector-borne diseases, venomous wildlife and insects, and poisonous plants. Venomous snakes, spiders, scorpions, and stinging insects can be found throughout various geographic regions, and are especially dangerous to .