. Bulletin of the British Ornithologists' Club. [Bull. 1979: 99(4)] 130. Fig. 2. Structural differences in the wings of Australian corellas. a. C. tenuirostrts—east- ern long-bill, b. C. pastinator pastinator=western long-bill, c. C. p. sanguinea=short-bill. and also the broader culmen; indeed, it is a 'short-bill' in which the tip of the maxilla has merely become prolonged. Forshaw (1969: 101) claimed that the differences between 'long' bills and 'short' bills were structural, but he compared eastern rather than western long-bills with short-bills. Concerning curvature of the bill, we
. Bulletin of the British Ornithologists' Club. [Bull. 1979: 99(4)] 130. Fig. 2. Structural differences in the wings of Australian corellas. a. C. tenuirostrts—east- ern long-bill, b. C. pastinator pastinator=western long-bill, c. C. p. sanguinea=short-bill. and also the broader culmen; indeed, it is a 'short-bill' in which the tip of the maxilla has merely become prolonged. Forshaw (1969: 101) claimed that the differences between 'long' bills and 'short' bills were structural, but he compared eastern rather than western long-bills with short-bills. Concerning curvature of the bill, we stress that the angle of inclination of the lower man- dible is a function of the angle of declination of the maxilla and related directly to the use to which the bill is put. In colour, eastern long-bills are much the most brightly marked (standards from Kornerup & Wanscher 1978). They have a splash of scarlet feathering on the lores extending broadly down the sides of the face and narrowly across the forehead, a distinct reddish yellow wash on feathers fringing the posterior margin of the periophthalmic skin, and an exposed band of scarlet down on the foreneck. On the other hand, they have only the faintest trace of sulphur yellow on the underwing. The feathers of the fluffy band of colour on the foreneck are structurally distinctive in that the feather proper is of the same downy form as its aftershaft. Short-bills and western long-bills have facial colour more-or-less restricted. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : British Ornithologists' Club
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