T w o P R E V I O U S P A P E R S of mine in British Birds (1935, 1950) gave population statistics for the Nightingale (Luscinia megarhynchos) and four species of warbler--Willow Warbler (Pbylloscopus trnchilus), Chiffchaff (PL collybitd), Garden Warbler {Sylvia boriti) and Blackcap (S. atricapilla)--in an area in the Severn Valley near Gloucester. I continued ...F I G . I . Sketch map of area of ...

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