Sand Martins feeding from the ground.--With reference to the notes by Mrs. E. M. Trevor and P. J. Oliver on House Martins Delichon urbica and Sand Martins Riparia riparia apparently feeding from the ground (Brit. Birds, 58: 511; 59: 499), the following may be of interest. On 17th and 28th July 1966, at Fairford gravel pits, Gloucestershire, we observed between 250 and 300 Sand Martins feeding on a...

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