jumping spider Archives

Many scientific and technological advances are inspired by the study of animals and plants. Spiders have long inspired innovations, especially related to their silk and web-making. A new development, however, is based on the design of jumping spider eyes.

Jumping spiders (family Salticidae) leap quickly to avoid predators, capture prey, or simply move around. They need good 3D vision to judge distances when they jump. Unlike human eyes, which have only one retina, jumping spider eyes can’t move, but they have multiple retinal layers. These layers capture the image with slightly different focus. Their poppy seed-sized brains then process the images, comparing differences in sharpness to compute the distance to an object.

A computer scientist at Northwestern University, Emma Alexander, and her colleagues have created an extremely efficient 3D camera dubbed a “SpiderCam.” They presented their project on June 7, 2026, at the Computer Vision Foundations Conference on Computer Vision and Pattern Recognition in Denver, Colorado. The SpiderCam perceives depth the same way that jumping spider eyes do, by capturing images on two layers of “retinas” with very slight differences in focus. A computer algorithm embedded in a custom chip processes and compares the images to calculate depth and distance. This SpiderCam uses less than a Watt of power to create real-time 3-dimensional images.

Possible uses for the SpiderCam include field recording, where capturing a 3D image with minimal power is essential. It could also be used in augmented reality applications where a person interfaces with the physical world and needs precise location information about surrounding objects.

The advantage of the camera based on jumping spider eyes is that it uses less energy and less expensive hardware than other 3D cameras. Humans continue to learn from animals, and as we discover God’s designs in nature, we can apply them in biomimicry to solve problems in technology and everyday life.

Reference: popsci.com

Color Vision Differences in Various Creatures - Jumping Spider — *Saitis barbipes*

Color vision differences in various creatures result from eye design. Humans see color because we have three kinds of cones in the retina that respond to different energies of light. Our eyes have color cones sensitive to red, green, and blue. If light stimulates all three types of cones, we see it as white. When light stimulates red and green cones but not blue, we see yellow. Other combinations result in every color we can see.

Some light energies do not trigger any of our cones, yet they affect us. For example, our eyes don’t perceive ultraviolet energy, but UV rays can cause sunburn. Likewise, we can’t see infrared energy, but we can feel it as heat.

Animals have many color vision differences compared to humans. Why do deer not see the orange jackets that hunters frequently wear? A deer can’t see very much color at all. That means a hunter standing still in the woods wearing an orange camouflage outfit will be invisible to a deer but highly visible to other hunters.

Some animals that do not see color can see light energies that we can’t. For example, a rattlesnake can see infrared, which is a lower energy than the visible light we see. A warm-blooded animal such as a rat or mouse gives off infrared radiation. A rattlesnake can see the infrared light coming from the rat on a very dark night when there is no light visible to humans.

The National Science Foundation reported on a jumping spider (Saitis barbipes) found in Europe and North Africa with no red color sensitivity. A red ball would appear gray or black to those spiders. However, the males of these furry spiders have a bright red crown and legs. Even though potential mates cannot see the red, certain areas of the spider’s body strongly absorb ultraviolet light. Those areas appear as “spider green” to other jumping spiders.

In addition to color vision differences, some animals have specialized vision tools to help them survive. For example, a marine turtle’s eyes have polarized corneas. That polarization allows the turtle to see reflected light because it is polarized parallel to the reflecting surface. A turtle needing to locate water will simply scan the horizon to see polarized light reflected from the water’s surface. Other animals, such as birds or fish, have polaroids in a vertical orientation, enabling them to see through clouds or water without having to deal with glare.

Designing cells that can detect light is only part of the story. Making eyes that meet the peculiar needs of various animals is much more difficult. Your vision is just one more support for David’s statement, “I will praise you, Lord, for I am fearfully and wonderfully made.” (Psalms 139:14.)

Reference: The National Science Foundation and the journal The Science of Nature

Tag: jumping spider

Jumping Spider Eyes

Color Vision Differences in Various Creatures