Do Black Widows always have the hourglass on the stomach?
2006-08-20 19:51:19 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Biology
it was crawling on my mom's computer. We live in Wisconsin. It was black and had a small red hour glass on it's back.
2006-08-20 20:16:16 · update #1
The black widow that would be expected in Wisconsin is the northern black widow, Latrodectus variolus. It has, on the underside of
the abdomen two red triangles forming what looks like an hourglass broken at the middle. It may also
have a row of two or three red dorsal spots on the
abdomen, in the midline. Juveniles have more
red and usually some white.
However a spider in the house crawling around on
a typewriter is not likely to be a black widow, which
is normally found in a web. A common black spider with a dorsal orange or red spot on the
abdomen is one of the jumping spiders, Phidippus
audax. The color of the spot varies and may be
white instead or orange or red. This is much more
likely to be found in a house walking actively
around. It has relatively short, stocky legs and is
quite hairy.
2006-08-21 02:32:22 · answer #1 · answered by Anonymous · 1⤊ 0⤋
We had a few black widows around the house. They're shy and they don't bite unless they feel threatened. The back is black, with the hourglass on the stomach, which you can see if you scoop it up on a glass plate. They're good spiders, don't kill them, they catch flies and mosquitoes.
2006-08-20 20:04:45 · answer #2 · answered by Dirk S 2 · 0⤊ 0⤋
The red mark should always be on the underside of the black widow's abdomen. It isn't always an hourglass, sometimes it is two separate marks, or just an odd shape.
I don't know of any spider like the one you describe.
2006-08-20 19:59:05 · answer #3 · answered by KALEL 4 · 0⤊ 0⤋
A spider with an hour glass on the back is a red back in australia if you get bitten you wont die straight away.
2006-08-20 20:05:48 · answer #4 · answered by Anonymous · 1⤊ 0⤋
A black widows mark is on the belly.
2006-08-20 19:56:19 · answer #5 · answered by Anonymous · 0⤊ 0⤋
If the hour glass shape is red it is a Black Widow (stay away, be afraid, be very afraid Muhahahaha, no really ... be careful... unless you want it to bite you and you die a painful death).
2006-08-20 19:56:54 · answer #6 · answered by Am 4 · 0⤊ 0⤋
Yes the black widows do have the hourglass
shape and it is red.If you happen to see one
I would suggest killing it.Better not take any chances.Ohh how I hate spiders!!!
2006-08-20 19:58:48 · answer #7 · answered by jenn 3 · 0⤊ 0⤋
On its back. It's a red hourglass.
2006-08-20 19:56:27 · answer #8 · answered by plstkazn 3 · 0⤊ 0⤋
Spiderman!!!!!
2006-08-20 19:56:01 · answer #9 · answered by protos2222222 6 · 0⤊ 1⤋
Yup !
2006-08-20 19:56:54 · answer #10 · answered by S.A.M. Gunner 7212 6 · 0⤊ 0⤋