Letters

01 December 1998
Comments Letters Many papers have been written about waterfowl hybrids and a lot of information is available, but there is still great interest in the subject because of identification difficulties and possible confusion with potential vagrants (Perrins 1961--but still...
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Letters

01 February 1971
Comments Letters Elusive species and the B.T.O. Ornithological Atlas project Some species are proving to be difficult to locate in fieldwork for the Ornithological Atlas. In order to prepare full maps for these species, we cannot rely solely on fieldwork carried out purel...
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