The Long-billed Thrasher is slender and long-tailed, averaging 26.5–29 cm (10.5–11.5 in) in length and about 70 g (2.5 oz) in weight. Adults are brown above with a brighter rufous tinge on the rump and tail, off-white below with a black streak on each side of the throat (the malar) and heavy black streaks on the breast and belly, especially the sides of the breast. There are two pale wingbars. The head is grayish, especially the face. The bill is black, fairly long, and slightly down-curved, and the eyes are orange to orange-yellow. Immatures resemble adults but have less distinct markings and buffier wingbars.
Painting of adult of the subspecies senetti from the United States and Mexican Boundary Survey.
RangeThis species is resident from South Texas through Tamaulipas and eastern Coahuila along the Atlantic slope of Mexico to central Veracruz. It occurs in brushy or thicketed habitats of all kinds.