. Bulletin of the British Ornithologists' Club. I29 [Bull 1979: 99(4)] feathers on the foreneck and face, tone of the underwing and calls. These characters have either been overlooked or misinterpreted in the literature and, besides, none of the recent descriptions is accurate. The long-billed corella of eastern Australia (tenuirostris) is by far the most distinctive of the three. It is a stocky bird with a disproportionally short tail (mean tail: wing ratio 0-45), a vestigial crest (usual length 33-34 mm), and a pointed wing in which the second outermost primary is longest and the sixt
. Bulletin of the British Ornithologists' Club. I29 [Bull 1979: 99(4)] feathers on the foreneck and face, tone of the underwing and calls. These characters have either been overlooked or misinterpreted in the literature and, besides, none of the recent descriptions is accurate. The long-billed corella of eastern Australia (tenuirostris) is by far the most distinctive of the three. It is a stocky bird with a disproportionally short tail (mean tail: wing ratio 0-45), a vestigial crest (usual length 33-34 mm), and a pointed wing in which the second outermost primary is longest and the sixth disproportionally shorter than the fifth (Fig. 2). By contrast, short- billed {sanguined) and western long-billed (pastinator) corellas are similar to. eastern long-billed corella western long-billed corella short-billed corellas Fig. 1. Distribution of Australian corellas. Letters indicate subspecies of short-billed corel- las, viz. p. sangutnea, p. gymnopis, p. normantoni. Arrows indicate probable, independent sources of the two long-billed corellas. Numbers indicate localities in text, viz. 1—Mornington Peninsula; 2—Port Phillip Bay; 3—You Yangs; 4—Riverina; 4a—Murray River; 4b—Murrumbidgee River; 5—Mildura; 6—Adelaide; 7—Milparinka; 8—Lake Muir; 9—Frankland; 10—Boyup Brook; 11—Perth (Swan River); 12—Northam; 13—Mukinbudin; 14—Jurien; 15—Morawa; 16—Geraldton; 17—Kununurra; 18—Vic- toria River; 19—Melville Island; 20—Cobourg Peninsula (Port Essington); 21—-Roper River; 22—Groote Eylandt; 23—Maria Island; 24—McArthur River; 25—Normanton; 26—Townsville. each other and different from eastern long-bills in their slender shape and in having longer tails (mean tail: wing ratio 0-49 in both), longer crests (usual length 41-57 mm in short-bills and 47-58 mm in western long-bills), and more rounded wings in which the third outermost primary is the longest and the distance between fifth, sixth and seventh primar
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