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
A Whiter Shade of Pale at Advision. Cordell was concerned that the sound of "A Whiter Shade of Pale" might prove problematic on the radio, due to the prominence of the drummer's cymbals. He therefore sent an acetate copy to Radio London, and his worries were assuaged when the disco jockey played the disc on-air and announced: "That sounds like a massive hit." The single was released on 12 May 1967 in the United Kingdom by Deram Records and entered "Record Retailer"s chart (later the UK Singles Chart) on 25 May. In two weeks it reached number 1, where it stayed for six weeks. Writing