Letters

01 December 1966 Comments Letters Week-end bias, length of stay of rarities and proportion of rarities undetected Sirs,--Although the effect of 'week-end bias' (the increased watching at week-ends) is often commented on, there appear to be no figures to show exactly how marked it is. In a...
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Letters

01 January 1951 Comments Letters SIRS,--An annual report for the County of Suffolk is to be published, beginning with 1950, and I would be grateful if any of your readers who may have records of observations made in Suffolk in this or subsequent years would be good enough to send them to...
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