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 October 1958 Comments Letters EGGS D I S A P P E A R I N G F R O M P E R E G R I N E E Y R I E S S I R S , -- T h e paper by D r . D . A. Ratcliffe on " B r o k e n eggs in Peregrine eyries" (antea, pp. 23-29) has greatly interested me, as it seems to throw considerable light on past ...
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