Quck answer
There are two types of spiders that are known to occasionally bite humans and feed on their blood: the yellow sac spider and the hobo spider. Despite this, these spiders are not aggressive towards humans and are actually beneficial to have around as they prey on other insects and pests in our homes and gardens. It is important to note that spider bites are uncommon and usually not harmful, but if you are bitten and experience severe symptoms, seek medical attention. Overall, these blood-loving spiders are not something to fear and are actually doing us a favor by keeping other pests at bay.
Wild Animals
Surprisingly, certain spiders have a preference for eating mosquitoes that have recently fed on human blood. This discovery could help in the fight against malaria. Researchers at the University of Canterbury in New Zealand conducted a study over several decades that was published in the Journal of Arachnology in July 2015. The study revealed that two types of spiders are highly skilled at killing mosquitoes. One of these spiders, Paracyrba wanlessi, lives in bamboo canes in stagnant pools of water in Southeast Asia, and preys on mosquito larvae, pupae and adults. The other spider, Evarcha culicivora, is found near Lake Victoria on the border of Kenya and Uganda, and has a particular taste for mosquitoes. Despite their appetite for human blood, these spiders are not able to bite humans, but instead prey on female Anopheles gambiae mosquitoes that carry and transmit malaria. Evarcha culicivora’s attraction to human blood makes it the only predator that selects prey based on its diet. The spider is attracted to the blood-carrying mosquitoes and can kill up to 20 Anopheles mosquitoes in quick succession, even when not hungry. Researchers believe that these spiders could be used for biological control of disease vectors. Malaria is responsible for approximately half a million deaths each year, and nearly half of the world’s population is at risk of contracting the disease.
According to a study, E. culicivora spiders have a preference for living on and in the walls of residential houses. The study’s author stated that these spiders are predators that feed on our enemies, and encourages people to welcome them into their homes as a free mosquito-eradication service. Although it is uncertain if E. culicivora will have a significant impact on the spread of malaria, the authors hope to help people understand that spiders are not villains. Interestingly, both E. culicivora spiders and Anopheles mosquitoes are attracted to human scent, particularly the odor of dirty socks.
FAQ
1. Are there spiders that feed on human blood?
Yes, there are spiders that feed on human blood, but they are extremely rare. One such spider is the yellow sac spider, which is commonly found in homes and buildings. However, it is important to note that these spiders do not actively seek out human blood and will only bite if they feel threatened or disturbed.
2. Are these blood-feeding spiders dangerous?
In general, these spiders are not considered dangerous to humans. Their bites can be painful and may cause some discomfort, but they are not known to transmit any diseases or cause any serious health problems.
3. Why are these spiders considered our friends?
Despite their reputation for feeding on human blood, these spiders actually play an important role in controlling other pests in our homes and buildings. By preying on insects like mosquitoes and flies, these spiders help to reduce the spread of diseases and keep our living spaces free of annoying pests.
4. How can I prevent spiders from biting me?
The best way to prevent spider bites is to avoid disturbing or handling spiders whenever possible. If you do encounter a spider, try to gently guide it outside or call a professional pest control service to safely remove it. You can also reduce the number of spiders in your home by keeping it clean and free of clutter, sealing up any cracks or gaps in your walls and windows, and using insect repellent or other pest control products as needed.
5. What should I do if I am bitten by a spider?
If you are bitten by a spider, it is important to clean the bite area with soap and water and apply a cold compress to reduce swelling and pain. If you experience any signs of an allergic reaction, such as difficulty breathing or swelling of the face or throat, seek medical attention immediately.
6. Can I keep blood-feeding spiders as pets?
While it is possible to keep blood-feeding spiders as pets, it is not recommended. These spiders are not well-suited to life in captivity and may become stressed or unhealthy if not properly cared for. Additionally, their bites can be painful and may pose a risk to other pets or family members in the home.
7. What do blood-feeding spiders look like?
Blood-feeding spiders come in a variety of shapes and sizes, but most are relatively small and have a reddish or yellowish coloration. The yellow sac spider, for example, is about 1/4 inch long and has a pale yellow body with darker legs.
8. How can I identify a blood-feeding spider?
Identification of blood-feeding spiders can be challenging, as many species look similar to other non-blood-feeding spiders. If you suspect that you have a blood-feeding spider in your home, it is best to contact a professional pest control service for identification and removal.
9. How long do blood-feeding spiders live?
The lifespan of blood-feeding spiders varies depending on the species, but most live for several months to a year. Some species, such as the yellow sac spider, may live for up to two years in ideal conditions.
10. Do blood-feeding spiders only live in homes and buildings?
No, blood-feeding spiders can be found in a variety of habitats, including forests, fields, and gardens. However, they are more commonly found in homes and buildings due to the abundance of prey and shelter.
11. How can I learn more about blood-feeding spiders?
If you are interested in learning more about blood-feeding spiders, there are many resources available online and in print. You can also contact your local university or natural history museum for information on local spider species and identification.
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