Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 17-19

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 23-25

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 25-27

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 28-31

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 32-35

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 36-37

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 42-44

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 47-49

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 49-55

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 55-59

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 59-63

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 63-68

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 69

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 74-85

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 86-91

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 92

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 94-107

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 115-117

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 118-128

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 129-134

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 134-137

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 137-143

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 145-151

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 151-157

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 157-165

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 165-168

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 168-172

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 173-177

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 181-184

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 189-191

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, pages 191-192

Published in Bulletin of the British Ornithologists' Club, in 1987, in volume 107, issue 1, pages 6-16

Published in Bulletin of The British Ornithologists' Club, in 1987, in volume 107, issue 1, pages 37-41