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Spider Photos - Red & Black Spiders

Here's some photos sent in by viewers.

Red and Black Spider (Ambicodamus crinitus, Family: Nicodamidae)

In summer, males leave their web, during daylight hours, and wander in search of females. This wandering habit often brings them indoors. Due to the red and black colour, the spider is often confused with the red-back spider and, as red is a common warning colour, the spider is sometimes thought to be highly venomous. The egg case has a woolly appearance and is suspended in the web.

Males are similar to
the female in colour. The female's body and legs are commonly bright red and the abdomen black, but the can vary from orange to dark red, sometimes with a bluish tinge. They are a small spider with slender legs, most easily recognised by colour pattern as described above. The male's body length is around 10mm and the female's 12mm. Their web consists of a few irregular strands built under bark, stones or logs.

Despite the red colour of this spider, its venom is not dangerous. At most, it may cause a local reaction around the bite site. Normal precautions, as outlined in the introduction, should be observed.

Museum Victoria

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Unidentified Spiders 2012 Unidentified Spiders 2011 Unidentified Spiders 2010
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Unidentified Spiders 2008 (2) Unidentified Spiders 2007 (1) Unidentified Spiders 2007 (2)
Unidentified Spiders 2007 (3) Unidentified Spiders 2006 (1) Unidentified Spiders 2006 (2)
Unidentified Spiders 2006 (3) Unidentified Spiders 2005 (2) Unidentified Spiders 2005 (3)
Unidentified Spiders 2005 (1) Unidentified Spiders 2004 (1) Unidentified Spiders 2004 (2)
Unidentified Spiders 2003 Unidentified Spiders 2002 Unidentified Spiders 2001
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RED & BLACK SPIDER

9 November, 2015:
Hello to whom ever it may concern, (spiders rule website) I was wondering if you can give me more information about this spider, I asked a friend of mine what it was (because she loves spiders) and she came to the result it was a nicodamidae spider (also known as the red and black spider). I found a few around my house and just wanting to make sure they aren't poisonous/ dangerous or anything like that. I have sent 2 photos along with this email to see if you can let me know more about the spider. Hopefully you'll be able to view the pictures thank you, Katie

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16 May, 2014:
Hi I was wondering if you could help me by telling me what this spider is. I live in Australia and found this is my back yard this morning.

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