In 1980, I lived in Sausalito, California. One night as I watched theevening news a fairly large creature crawled across my kitchen floor. It was dark, jointed, I believe it had what appeared to be pinchers, and I swear it hissed at me when I swept it out onto the deck. The Giant Vinegaroon looks very much like what I remember. My question is are they found in the San Francisco Bay Area?
24 years is a long time to wait for an answer. The Vinegaroon or Giant Whip Scorpion, Mastigoproctus giganteus, is listed as ranging in the South and SouthWest. I would say it is entirely possible that one could have been in Sausalito, especially since they are often kept as pets and pets escape. This is one of the ways that natural ranges are extended to include new locations with hospitable climates. I have gotten reports of tarantulas and scorpions hissing, and it is possible that the Vinegaroon can also stridulate, defined as the rubbing together of body parts which produces a hissing type sound. Hope that answers your questions.
Thanks for the answer. I have searched insect books over those 24 years without much luck. I saw many tarantulas in Southern California, but the scorpions I saw were all small. I remember this being 3-4 inches, of course time and my horror might have added to its length.
Our sources state that the Giant Vinegaroon can reach five inches in length, so yours was a small one.