Tachina ferox can reach a length of. These flies have a blackhairythorax and a yellow-red abdomen, with a black longitudinal marking in the middle and numerous long straight bristles at the end. Wings are hyaline, yellowish at the base. Basal half of the palps are brown or blackish. Males are a little concave in theirs dorsal centre. In the abdomen only segments 7 and 8 are hairy.