Al, critters do mostly croak in wintertime up here but not so fast for them SPIDERS ! Have you ever heard of the "Violinback" also known as the "Brown Recluse" spider ? Although they are uncommon in Denver there have been known cases of severe spider bites. I had a lady who worked for me at MCI who's daughter was bitten by one, hiding in her shoe. Her foot swelled to the size of a football and when the venom took its course she nearly lost her foot to amputation, but for some powerful drugs used to counteract the bite. Check out this article:
"The bite of the brown recluse spider can result in a painful, deep wound that takes a long time to heal. Fatalities are extremely rare, but bites are most dangerous to young children, elderly, and those in poor physical condition. When there is a severe reaction to the bite, the site can erupt into a "volcano lesion" (a hole in the flesh due to damaged, gangrenous tissue). The open wound may range from the size of an adult's thumbnail to the span of a hand. The dead tissue gradually sloughs away, exposing underlying tissues. The sunken, ulcerating sore may heal slowly up to 6 to 8 weeks. Full recovery may take several months and scarring may remain".
That's Nasty !