. Bulletin of the British Ornithologists' Club. Birds. D. J. Pearson & J. S. Ash 228 Bull. 1996 1 lf,(4). Figure 2. A comparison of Cursorhis rufus (left), C. somalensis (centre) and C. cursor (right): top, adult underwing; middle, adult uppertail; bottom, juvenile uppertail. subterminal lines on tl and t2 and a single broad dark subterminal mark on t3-t6. In rufus, barring is more confined to the tail tip and is absent from t6 (Fig. 2c), and the general colour of the tail is greyer than in somalensis. Underwing patterns differ between juveniles of these forms in much the same way a
. Bulletin of the British Ornithologists' Club. Birds. D. J. Pearson & J. S. Ash 228 Bull. 1996 1 lf,(4). Figure 2. A comparison of Cursorhis rufus (left), C. somalensis (centre) and C. cursor (right): top, adult underwing; middle, adult uppertail; bottom, juvenile uppertail. subterminal lines on tl and t2 and a single broad dark subterminal mark on t3-t6. In rufus, barring is more confined to the tail tip and is absent from t6 (Fig. 2c), and the general colour of the tail is greyer than in somalensis. Underwing patterns differ between juveniles of these forms in much the same way as between adults (see Hayman et al., p. 250). Discussion The similarities and differences between somalensis (including littoralis), cursor and rufus may be summarised as follows: 1. Adults of all three share the same head and crown pattern and have plain 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 : The Club
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1893
