Red Widows
Most people know that black widow spiders are dangerous, but black widows are actually part of a much larger family of poisonous widow spiders. Red widow spiders are common in southern Florida and can be recognized by their red head and legs and hourglass marking on their abdomen. These spiders frequently take up residence in abandoned, desolate areas as well as in rubbish and wood piles. Though they are venomous, an effective anti-venom treatment is available and few people are seriously harmed by bites from these spiders.
Jumping Spiders
Jumping spiders are common throughout North America, and Florida is home to many species of jumping spiders. These spiders can be recognized by their squat bodies and hairy legs. They come in a range of colors and may have red markings and appear completely red from a distance. They are not dangerous to humans, though they can jump extraordinarily high.
Woodlouse Spider
Woodlouse spiders are small with hard bodies and large fangs. They prey on crustaceans like crabs and crayfish, and are most likely to be found near bodies of water. These spiders are typically rust-colored, but can range from dark brown to light red. Though these hard-bodied spiders can look intimidating, they are not dangerous to people, though their bites can be as painful as a bee sting.
Insects and Arachnids
Spiders are occasionally confused with insects and other arachnids, particularly when people only get a passing glance. Ticks are tiny arachnids that feed on animal blood. Because they have eight legs, they may be confused with spiders. They are frequently reddish or brown. Many species of mites, including the whirligig mite, are also red and eight-legged. Spiders are typically at least a half inch in diameter. Animals smaller than this may be an insect or another kind of arachnid.