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 A Whiter Shade of Pale "A Whiter Shade of Pale" is the debut single by the British rock band Procol Harum, released 12 May 1967. The single reached number 1 in the UK Singles Chart on 8 June 1967 and stayed there for six weeks. Without much promotion, it reached number 5 on the "Billboard" pop chart in the United States. One of the anthems of the 1967 Summer of Love, it is one of the best selling singles in history, having sold more than 10 million copies worldwide. With its Bach-derived instrumental melody, soulful vocals, and unusual lyrics –