Pale crag martin to do so, it would cast doubts on their specific distinctness. There are several subspecies differing in plumage shade or size, although the differences are clinal, and races interbreed where their ranges meet. The pale crag martin of the nominate subspecies "P. o. obsoleta" is 12–13 cm (4.7–5.1 in) long with light brown upperparts, becoming paler on the lower back, and a short square tail that has small white patches near the tips of all but the central and outermost pairs of feathers. It has a pale grey throat, upper breast and underwing coverts, and the rest of the underparts
Dichomeris straminis is a faint streak of ferruginous-brown scales, another slight streak of the same colour beyond the middle of the cell, reaching to the dark marginal shade. The hindwings are pale rather cinereous straw-colour. Dichomeris straminis Dichomeris straminis is a moth in the Gelechiidae family. It was described by Walsingham in 1881. It is found in Mozambique, South Africa and Zimbabwe. The wingspan is about 18 mm. The forewings are pale straw-colour, with a pale ferruginous shade obliquely parallel to and near the apical margin, extending to the apex, but not quite to the anal angle, containing bright bluish purple metallic