Picture yourself as a red-tailed hawk, gliding high above the ground, eyes sharply focused on potential prey. You spot a squirrel below, expertly camouflaged against the ground, but your keen vision spots it easily.
Birds of prey like hawks and eagles are famous for their exceptional eyesight. But are they really the best, or do other animals see even better?
The truth is, there’s no simple answer. It varies by species and environment. “There is no perfect visual system,” says Esteban Fernandez-Juricic, a biology professor at Purdue University. He explains that developing advanced eyesight comes at a high cost in terms of energy, so animals evolve vision suited to their needs.
Outstanding Vision: Raptors
Raptors, such as eagles and hawks, are known for their incredible details in vision. They need to spot prey from miles away. “Their vision is about three to five times more detailed than ours,” notes Thomas Cronin, a biology professor at the University of Maryland, Baltimore County. Imagine looking through powerful binoculars—that’s how sharp their eyesight is.
Two features help them see so well. First, their eyes are large for their body size. Second, they have a high number of light-detecting cells known as photoreceptors in their eyes. Together, these traits allow raptors to detect movement and find food quickly.
The Color Champion: Mantis Shrimp
Mantis shrimp can even see ultraviolet light and have specialized receptors that detect polarized light, adding another layer to their color vision. While it’s not clear how they process this information, their way of interpreting colors could vastly differ from ours.
The Speedy Vision of Insects
Insects have another kind of visual advantage—they can see much faster than we can. Humans catch about 60 frames per second, but many insects can capture hundreds. This high-speed vision means that fluorescent lights flicker to them like strobe lights, making it tough for us to swat a fly. They often see us before we even react.
Understanding Trade-Offs
These specialized eyes come with trade-offs. Both mantis shrimp and insects have a type of eye called a compound eye, which gives them lower-resolution images compared to ours. In contrast, human eyesight offers a balanced compromise—good enough for most tasks without the extreme complexities found in other species.
So, the next time you gaze up at the sky, remember: while hawks may soar high and see far, our vision serves its purpose just fine.