Sexes alike. Dark sooty-brown above; square-cut, short tail, with white spot on all but outermost and central tail feathers; paler underbody; faintly rufous chin and throat, with indistinct black streaking. Small parties; flies around ruins, crags and old buildings, hawking insects in flight; acrobatic, swallow-like flight and appearance; rests during hot hours on rocky ledges or some corner.