Why do pronghorn have such keen eyesight?

Evolutionary Pressures

Pronghorn eyesight is a direct result of their evolutionary history. These antelope have been hunted by predators for thousands of years, and their ability to detect potential threats at a distance has been crucial for their survival. With the loss of habitat and the introduction of new predators, the selective pressure on pronghorn to develop exceptional eyesight has only increased. In fact, studies have shown that pronghorn can spot predators from as far as 3 miles (4.8 kilometers) away.

Anatomical Advantages

Pronghorn eyes are positioned on the sides of their head, giving them a wider field of vision than most other animals. This is beneficial for detecting movement and spotting predators in their peripheral vision. Additionally, pronghorn eyes are positioned high on their head, allowing them to see over tall grasses and other vegetation. Their large eyes also contain a reflective layer called the tapetum lucidum, which enhances their low-light vision and allows them to see better in the early morning and late evening hours. In fact, pronghorn can see in conditions with as little as 1/8 of a full moon.

Hunting Implications

For hunters, pronghorn eyesight is a significant factor to consider when planning a hunt. Spot and stalk hunting, where the hunter observes the pronghorn from a distance and then stalks closer, relies heavily on the hunter’s ability to remain undetected. Hunters should use camouflage clothing, stay downwind, and move slowly to avoid detection. Glassing open country with high-quality binoculars can also be an effective way to locate pronghorn, particularly at water holes or feeding areas. In some cases, hunters may use decoys or other tactics to get closer to their quarry, but these methods should be used with caution and respect for the animal.