do falcons have any yellow feathers?
- Known by several names, including mostachial stripe or malar stripe, a bird's moustache is a line of feathers that extends downward from below its eyes or beak. Not all birds have malar stripes and those that do may have red ones, yellow ones, or most any other color.In Praire Falcons, the malar stripe is dark brown or black. Both the Peregrine Falcon and Prairie Falcon sport malar stripes, though the Prairie Falcon's is much thinner.ot all birds have malar stripes and those that do may have red ones, yellow ones, or most any other color. In Praire Falcons, the malar stripe is dark brown or black. Both the Peregrine Falcon and Prairie Falcon sport malar stripes, though the Prairie Falcon's is much thinner.