a brown reclouse
A garden orb weaver probably
It depends on what species you desire, and what you consider huge. In my opinion the male Hobo Spider has a pretty large abdomen. However when comparing most male spider's abdomen to the female abdomen, the answer might as well be no.
If you are in Australia it sounds like a Mouse spider. I'm in North America and found a similar spider in my basement this morning, but can't seem to find out what it is.
It is likely a brown widow spider. They're not as venomous as a black widow spider, but you should still be very careful with it.
A spider that is brown with a large yellow belly might be a brown widow. Almost all spiders roll into a ball for protection. This spider could also be a garden orb.
Depending on its size, the spider with tan and brown striped legs and a large white abdomen might be an orb weaver, a common house spider, or even an orchard spider. There are a huge variety of spiders with this description.
trarantrala
Gasteracantha elipsoides is somewhat close to your description, but I'm not sure if it is the same. Gasteracantha elipsoides usually has six spikes, usually reddish.
No, they are NOT naturally found in Oregon. However, the hobo spider does occur in Oregon and the Northwest states. It is commonly mistaken for brown recluse, and can cause the same effects (skin lesions).http://brownreclusespider.com/faq.htm http://www.oregon.gov/ODA/PLANT/IPPM/spider.shtml
The cat-faced spider (Araneus gemmoides) may be described as having a large abdomen with four pin-sized holes.The spider is harmless. It is called cat-faced because of the patterning of the dimples, holes or indentations on its abdomen. The pattern often is interpreted as reminiscent of the eyes and ears of a cat.
Cat-faced spider is the common name for Araneus gemmoides.The spider attracts attention because of its large abdomen. A pattern of four dimples, holes or indentations may be seen on its abdomen. Many people see the pattern as reminiscent of the eyes and ears of a cat.
The quick answer is insects, live insects, dead insects, both small and large. They feed on them all. There are very few insects that a brown recluse spider will not eat.