What is a malar stripe?

A malar stripe refers specifically to a facial marking found in certain bird species, particularly those within the genus Falco, which includes various types of falcons. This stripe typically runs diagonally from the eye towards the beak, serving both a functional and aesthetic purpose. Functionally, it can help reduce glare from sunlight, aiding in the bird's vision while hunting. Aesthetically, it contributes to the bird's identification, as different species may have varying patterns and coloration in their malar stripes. This characteristic can also feature prominently in the study of avian behavior and ecology, further emphasizing its significance in identifying and understanding these raptors.