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
Cambridge Blue (colour) since 1892 and the colour, along with Oxford Blue, is the official colour of Brisbane Grammar School, Wesley College, Colombo, Wycombe Wanderers F.C., the Toronto Argonauts of the Canadian Football League and the Argonaut Rowing Club, also based in Toronto. The King's Own Calgary Regiment use both Cambridge Blue and Oxford Blue as their regimental colours. Cranbrook School also use Cambridge Blue as the house colour for Davidson. Cambridge Blue (colour) Cambridge Blue is the colour commonly used by sports teams from the University of Cambridge. There is considerable dispute regarding the exact shade of the colour that should be