Though, there are some morphological differences, the three varieties are pretty much related and similar to each other. Like many other venomous creatures, the black widow spider has bright red pattens on it as a warning sign for predators that would attempt to feed on it. The black widow spider is not capable of killing a bird that would eat it, but the digestive sickness that would follow, will be definitely enough to make it avoid attacking the black widow again. Brown Recluse Spider Bite Given the lack of aggressive behavior of the species in general, the brown recluse spider bite should be a trifle. Yet, things are not that simple since a mere exposure to the venom of this spider can trigger a whole range of very unpleasant reactions. As it seldom happens for a person to suffer from a brown recluse spider bite, many doctors have difficulties in diagnosing certain symptoms that accompany it, very often such a bite can be even taken for a staphylococcus skin infection that is very similar in manifestation and symptoms. Though the color specific to the species is brown, there are yellow and black varieties too, nevertheless, these color patterns are not a general characteristic of the brown recluse spider. The color variety may be absent, just as the violin marking can be hardly visible. Nevertheless, there is one other element that clearly makes the recognition of the brown recluse spider possible. Most bites occur when one accidentally stick their hands into such secluded areas and corners or when the spider gets pressed against the skin. Wearing some rubber gloves when cleaning up around the house will help you avoid being exposed to a direct contact with the brown widow spider. The hourglass mark specific to all widow spiders colored in yellow or orange remains a distinguishable characteristic on the bottom of the abdomen. Thus, if you get a huntsman spider on your clothes, you'll find it pretty difficult to shake it off. Far from being seen as a threat to humans, the huntsman spider is pretty useful since it mainly feeds on insects. Nevertheless, the Australian variety of the species has been reported to inflict serious bites that cause not just pain and inflammation, but vomiting episodes, fever, headaches and even changes in the heart rate. The severity of spider bites is determined according not only to the species to which the aggressor belongs, but to the amount of venom that is injected by the spider. Thus, when a spider is trying to subdue its prey, the venom amount depends on the size of its meal, whereas, in a defensive venom release, the spider will do anything to protect itself and its nest.