Letters

01 January 1985
Comments Letters How many bird species in the world? In a recent book review (Brit. Birds 77: 280) mention is made of the '8,500-odd species' of birds in the world. A similar figure is quoted by the late Leslie Brown in his foreword to A Complete Checklist of the ...
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Letters

01 December 1974
Comments Letters Eye colour of the Hen Harrier D. I. M. Wallace's remarks (Brit. Birds, 65:358-359) on the eye colour of an immature of the American subspecies of the Hen Harrier Circus cyaneus hudsonius at Cley, Norfolk (see Brit. Birds, 64: 537-542), were confusing a...
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