Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 6-7
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 7-9
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 9-10
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 14-20
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 20-25
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 26-31
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 32-34
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 35-37
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 37-38
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 38-43
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 43-47
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 48-51
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 62-64
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 64-65
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 71-77
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 77-79
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 79-80
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 83-86
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 90-93
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 93-94
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 94-103
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 103-107
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 107-109
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 109-110
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 110
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 123-126
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 126-130
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 137-138
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 139-140
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 140-141
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 142-143
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 143-145
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 145-153
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 153-159
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 159-160
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 167-169
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 170-171
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 171-175
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 175-179
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 181-184
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 184-187
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 187-193
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 194-197
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 198-202
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 203-205
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 205-206
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 207-212
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 213-222
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 222-225
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, pages 225-226
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Published in Bulletin of The British Ornithologists' Club, in 1990, in volume 110, issue 1, pages 13-14
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