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
Pale Fire Pale Fire Pale Fire is a 1962 novel by Vladimir Nabokov. The novel is presented as a 999-line poem titled "Pale Fire", written by the fictional poet John Shade, with a foreword, lengthy commentary and index written by Shade's neighbor and academic colleague, Charles Kinbote. Together these elements form a narrative in which both fictional authors are central characters. "Pale Fire" has spawned a wide variety of interpretations and a large body of written criticism, which Finnish literary scholar Pekka Tammi estimated in 1995 as more than 80 studies. The Nabokov authority Brian Boyd has called it "Nabokov's most perfect