IN view of the recent notes on the display of the Sand-Martin (Riparia r. riparia) by A. Watson (antea, Vol. xxxix, p. 282) and A. S. Thom (antea, p. 20) the following notes may be of interest. My observations were made between 1942 and 1945 along the rivers Severn and Teme in west Worcestershire. Sand-Martins breed in colonies, averaging about nine nests in each, at intervals along these rivers....

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