Brindle is a recessive, uncommon marking that presents as soft, somewhat mottled, or textured stripes. The stripes must be vertical and perpendicular to the spine over the body, legs, and head. When the wing is extended fully, Brindle stripes must still be perpendicular to the spine. Only over the tail, the stripes can be vertical or diagonal to the spine. The stripes can lightly blur together as long as it's still clear there are vague stripes present.