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Old Jun 28th 2004, 10:51 pm   #1
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Default Poisonous Spiders in Canada

Black Widow Spiders

The Black Widow is a poisonous spider easily identified by its black color and a red, hourglass-shaped spot on the huge, black abdomen of the female. This spider gets its name from the fact that the female eats the male after mating.

Where it lurks - Black Widows like to build webs in or under objects close to the ground. They are commonly found in stacks of firewood, storage sheds, water meter boxes, under porches, and in or around flower pots. They are not overly agressive, unless touched, and they rarely leave their webs, where they hang with their bellys pointed up. Most people are bit carrying firewood, or moving stacks of newspapers or magazines around in the garage. To avoid being bitten, wear gloves and long-sleeve shirts when handling firewood.

How serious is the bite? - Although the venom of Black Widows is 15 times more deadly than that of most rattlesnakes, not much venom is injected in a bite, and the venom in small doses is not particularly potent. However, the Black Widow bite, like the sting of bees and wasps, can be fatal to some people. At least 4 deaths from Black Widows were reported in the U.S. between 1989 and 1999. The seriousness of a bite will depend upon the individual, where on the body they are bit, and how much venom is injected.

Black Widow venom attacks the nervous system. Besides pain and minor swelling that may or may not result from a bite, symptoms include muscle cramps, convulsions, and/or stopped breathing. The few reported deaths in the U.S. resulted from respiratory failure.

An anti-venom is available, but most people are simply kept under observation in a doctor's care for a few hours and sent home if serious symptoms do not result. Fortunately, the effects of most bites do not last long, and most people recover in a few hours.


Brown Recluse and Fiddleback Spiders

The Brown Recluse is a small, but very poisonous spider identified by the violin-shaped area on the back of the head, with the base of the violin pointing to the head and the stem pointing to the abdomen. The Fiddleback Spider is a nearly identical species that is equally poisonous.

Where it lurks - The Brown Recluse is an indoor spider that likes to build webs behind or beneath furniture and appliances, and in the corners of closets. They are commonly found in shoes and clothes that have not been worn for awhile, and in folded bedding that has been stored in a closet. Most people are bit putting on shoes or clothes that have not been recently worn. To avoid being bitten, shake out shoes and clothes before putting them on.

How serious is the bite? - The Brown Recluse bite does not normally result in death. However, about 3 times as many people in the U.S. have died from Brown Recluse bites as have died from Black Widow bites. Because of this fact, and because of the long-lasting damage that often results from a bite, Brown Recluse are the more deadly spider. The seriousness of a bite will depend on the individual, where on the body they are bit, and how much venom is injected.

Brown Recluse venom destroys tissue around the bite. Typically, a large swollen area develops not long after the initial bite, with a white blister on the actual bite. This blister soon develops into a "volcano lesion", characterized by a hole that extends into the wound and oozes puss. The hole is the result of gangrenous tissue that develops around the bite.

No anti-venom is available, but Cortisone is often injected around the bite to help minimize tissue damage. Unfortunately, the effects of Brown Recluse bites are long lasting, and recovery can take weeks, even months. Plastic surgery is typically required afterwards.
 

Old Jun 29th 2004, 1:47 am   #2
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I have lived here for 37years, I have not (knowingly) come into contact with one of those spiders, and I live in the city but I also have a cabin at the lake, come into contact with lots of wild life but (thankfully) not the black widow spider. hope it stays that way
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Old Jun 29th 2004, 1:48 am   #3
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Thanks for that Glaswegian! :scared:

Just had a tingle all over me spine...felt like a 1,000 spiders crawling......
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Old Jun 29th 2004, 1:53 am   #4
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These creepy crawlys are only out west right?

On a slightly related topic I know there is a type of rattlesnake (Missisagua Rattlesnake) found around the Georgian Bay area of Ontario, but its very rare and very shy. Not worth loosing sleep over, this isn't Australia after all!

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Old Jun 29th 2004, 1:55 am   #5
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Yes you're right Iain...hubby told me of them and they are pretty 'tame' in comparison to their name.
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Old Jun 29th 2004, 1:59 am   #6
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Quote:
Originally posted by iaink
These creepy crawlys are only out west right?

On a slightly related topic I know there is a type of rattlesnake (Missisagua Rattlesnake) found around the Georgian Bay area of Ontario, but its very rare and very shy. Not worth loosing sleep over, this isn't Australia after all!

Iain
There are LOTS of rattlesnacks here in the Okanagan!

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Old Jun 29th 2004, 9:38 pm   #7
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There are Black Widow spiders in Ontario , mainly in the North but I recall reading of a couple of 'incidents' in Orangeville which is just down Highway 9 form Newmarket and about an hour or so from Toronto.

The rattle snakes in Georgian Bay are located on Beausoleil Island where, oddly enough, my wife's family always go Camping. You can only get to the island by boat and it's a pretty popular camping place. They have a ranger station with anti-venom but I never heard of anyone getting bitten as they are fairly reclusive. They did catch a couple when I was there once and brought them around in the snake tubes to show campers and illustrate dangers. Recently the camping has been shut not because of the rattle snakes but because of some Bears that migrated to the island when the lake was frozen and decided to stay. Much more to fear from a family of bears than any rattle snakes or spiders.

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