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Some Scottish Breeding Duck: Their Arrival and Dispersal

    Abstract

    The problems of the increase and extension of range of ducks in Scotland, and in other countries, have long exercised ornithologists throughout the British Isles. As the authors of the volume under notice point out, protection and a better feeling towards and a greater interest in all wild birds are probably important factors in the case but do not explain everything. Certain species other than ducks are as steadily decreasing, and the rise and fall of a species is a complicated biological problem which may have but indirect association with human interference, or may be due entirely to other causes. The recent colonisation of Scotland by other birds, such as the starling, turtledove, and great-crested grebe, may be due to the necessity for an over-abundant species to find new areas and the possibilities of settling in an area where raptorial birds and other enemies have been largely destroyed by man's advance and action.

    Some Scottish Breeding Duck: Their Arrival and Dispersal.

    By Evelyn V. Baxter Leonora J. Rintoul. Pp. vii + 90. (Edinburgh: Oliver and Boyd, 1922.) 5s. net.

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