Is this spider poisonous?

Question

It looks like a black widow but on its back it has white spots

Answer 1

All spiders are venomous to one degree or another, but only a few are actually hazardous to your health. The one you're describing sounds like a typical house spider, not dangerous at all. Leave it alone, or move it outside. Put a drinking glass over it and slide a sheet of paper or an envelope under the rim of the glass, take it outside, and release it.

Answer 2

scientific name: Phidippus regius C.L. Koch (Arachnida: Araneae: Salticidae
Jumping spiders
Jumping spiders, all of which are in the family Salticidae, are among the most interesting spider groups to watch. Jumping spiders come in many sizes and color patterns. Active hunters during the day, they have good eyesight, relying primarily on movement to locate prey. They stalk their prey before attacking in a fast leap. Jumping spiders put out a line of webbing when they jump and can sometimes be seen dangling from this silken dragline after a leap that fails.
Many jumping spiders are bold, stocky and often brightly colored. They often have conspicuous bands of black and white on their bodies or legs. Others have velvety red abdomens and some even have metallic colors on the chelicerae. Jumping spiders have eight eyes, with one large pair in the front. Like most spiders, jumping spiders are not considered hazardous to humans and are unlikely to bite unless cornered or handled.
The bold jumper, Phidippus audax, is one of the most common and conspicuous of the jumping spiders. It is black with a distinct irregular orange to white spot on the back of the abdomen. It can be found in gardens and around homes

Answer 3

It is probably one of the jumping spiders of the
genus Phidippus. The commonest one in much
of the U.S. is Phidippus audax. Black widows
may have white and red on the backs in the young
individuals, but the white is normally in stripes, not
spots. The red hourglass is on the underside, not
on the back.

Most (but not quite all) spiders have venom, but
in only a few does it have any significant effect
on large vertebrate animals. Even in the most
poisonous ones the mortality rate in humans is
quite low.

Answer 4

Without seeing a picture of it I can't know. A young Black Widow will have some cream colored tiger stripes on its body. Be careful with dangerous things.

Answer 5

It is a widow if it has an hour glass on its underside. There are brown widows, black widows, and spotted as well as striped widows.

Answer 6

Have you done a google search for images, that's probably your best bet for determining what type of spider it is.

Answer 7

I'm guessing it's a jumping spider... like this maybe?
http://upload.wikimedia.org/wikipedia/commons/b/b2/Phidippus_workmani_dorsal.jpg

if so.. no.

Answer 8

It's harmles!