It’s a natural eyeliner. Peregrine falcons have dark feathers around their eyes. They are sunscreens that improve your ability to hunt other birds. It is the natural nature of falcons to hunt. Only now has it been scientifically proven.
Make-up for the occasion
It has been speculated that it served to better locate prey that moved quickly in sunlight. But research suggests a lot more. He says these feathers evolved with the weather. The sunnier the bird’s habitat, the larger and darker the dark feathers are.
They are called malar fringes or “mustaches”. They reduce glare from sunlight. Thus, they offer a competitive advantage in fast car chases. It is an evolutionary trait that is mimicked by some top athletes. The natural makeup of falcons for hunting is replaced with dark coloring under the eyes.
There was no known association between light intensity and this ‘eyeliner’. Until this study was published in the journal Biology Letters. The University of Cape Town (UCT) and the University of the Witwatersrand, South Africa are involved.
The scientists used photos of peregrine falcons from around the world. They rated the size of each bird’s streak of streak. They then examined how these malar streaks differ in terms of aspects of the local climate. Below them the power of sunlight.
Hawks of the world
The study included comparing the characteristics of the malar margin. They examined samples from 94 different regions or countries. The results were clear. The peregrine falcon’s malar streaks were larger and darker in regions of the world where sunlight is strongest.
“The sunburst hypothesis has become established in popular literature. It has never been empirically tested before, ”said Michelle Vrettos. He is a master’s student at UCT. He conducted the investigation. “The role of the malar margin in pilgrims is best explained by this sun glare hypothesis.”