Spiders that are harmful are the Black Widow, Brown Recluse, Hobo spider, Yellow Sac spider, Sun spider, and the Orb weaver spider.
Black Widow spiders are abundant in the southwest states. Adult black widow females are jet black in color and an hour glass design on the underneath side. Their body is about 1/2 inch in length.
Desert brown Spiders Adults are tan to dark brown with a dark fiddle shaped marking on the top of their body. The length of their body is about 1/4 inch to 1/2 inch in length.
Hobo or aggressive house spider is approximately 3/8 inch to 5/8 inch across and has a chevron marking on the top of the abdomen.
Sun Spider: These spiders for the most part live in burrows in the ground. They feed on other insects and arachnids. They have very large jaws and are capable of attacking rats, mice lizards, small snakes, and outside cockroaches. They do not have a venom however can cause a very bad bite that will need to be cleaned and seen by a medical service to avoid an infection.
Orb Weaver Spider: Produce a circular formed web that is designed to catch flying insects. the web is attached on both sides to bushes or structures that will suspend the web in the air.
Yellow Sac This spider is approximately 3/8 inch across the body and these spiders are pale yellow in color, and are known for building sac-like webs in the corners of walls and ceilings. The yellow sac spider delivers a painful bite. The venom from a yellow sac spider bite cause redness, and a burning sensation at the site of the bite. Individuals experience severe symptoms such as nausea, vomiting, and headaches. If you suspect that you have been bitten by a yellow sac spider, it is important to seek medical attention as soon as possible.
