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Notes

01 May 1963 Comments Notes FOE some years now I have been paying particular attention to the nestlings of common birds. It is of course now known to all ornithologists that the parents keep the nest clean (as a general rule) by carrying away the excrement, and often by swallowing ...

The Sequence of Plumages of the Rook, With Special Reference to the Moult of the " Face."

01 May 1963 Comments Main paper I T has always been a disputed point as to whether the Rook (Oorvus f. frugihgus) gets its bare " face " by means of abrasion of the feathers or by a moult. Most ornithologists have favoured the moult theory or have regarded it as a " natural peculiarity....

Letter

01 August 1933 Comments Letters SIRS,- --In his " Survey of the Rooks in the Midlands," Mr. Roebuck deals (antea, p. 23) with the change in population on breeding. But in only a few lines he tells us that, after May, either a wholesale slaughter in some rookeries or a gradual fall in nu...

The Rook Roosts of South Northumberland and the Boundaries Between their Feeding Territories

01 August 1933 Comments Main paper T H E observations on which this account is based were begun in the Christmas vacation of the winter 1931-32, when one roost was located and a knowledge obtained of the extent of its feeding territory in certain directions. In the following year from mid-...

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Notes

The Sequence of Plumages of the Rook, With Special Reference to the Moult of the " Face."

Letter

The Rook Roosts of South Northumberland and the Boundaries Between their Feeding Territories

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