If you have ever been up close and personal with a spider that has invaded your home, you know that spiders have many eyes and quick reflexes. So, does that mean that spiders have good eyesight? You might be surprised to learn that most spiders have poor vision and must rely heavily on their other senses to catch prey, find a mate, and avoid predators.
Spider vision has been the subject of much research, and we are only now starting to understand how spiders see the world. Unlike insects that have compound eyes, spiders have simple lenses, one for each eye. While the majority of spiders have 8 eyes, some have 6, 4, 2, or even 0 in the case of some cave dwellers. All of these eyes do not make for better vision though. It is believed that most spiders can detect changes in light and dark intensity, but little else.
Instead of eyesight, most spiders use other senses to help meet their needs. Touch, smell, taste, and sensitivity to vibrations are some of their most developed senses. Being able to sense vibrations is especially important for web-building spiders. They use this powerful ability to know when prey is caught in their silk.
There are a few species of spiders, however, that do have good eyesight because it is essential for their ability to get food. Spiders that hunt down their prey like jumping spiders, wolf spiders, and net-casting spiders, need good eyesight in order to capture their prey.
The jumping spider is an excellent example of how species have evolved and adapted to their circumstances. Jumping spiders have 3 different types of eyes (8 in total) that work in 3 different ways. Some produce blurry, wide-angle images, others are able to judge distances, and the largest pair provides a clear, focused image that researchers believe is probably in color. These eyes are arranged so that the jumping spider can see all around. There are 2 large eyes and 2 small eyes in the front, along with 2 tiny eyes and 2 medium eyes on the top of the head.
All species of spiders are slightly different when it comes to their eyes, but you don’t need to feel sorry for them. Spiders have all the right adaptations to help them thrive, both outdoors and indoors. If you are struggling with spider control, PF Harris can help. Our line of home pest control products was created so that you can take care of your pest problems on your own, without spending a lot of time and money. Harris Spider Killer is an option to get rid of spiders both inside your house and out. We also offer spider traps to help you monitor the spider situation so that you can get a jump on the problem before it gets out of hand. Spiders are fascinating creatures, but they can be admired in the great outdoors and not in your home. For more information, check out Spiders: The Ultimate Guide.