Aves, p�le ornithologique de Natagora

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Aves, 14/2 | 1977 | 101-113

Billen, G. & Tricot, J.

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Article summary

During a survey made in the southern half of Belgium in 1972 and 1973, 4.000 pairs of Sand Martins (Riparia riparia) divided in 126 colonies were accounted. The nature of the subsoil is the main factor of their settlement : most of the colonies is located either in sand pits or on steep river-banks. The nest holes are generally burrowed in the upper part of the bank; it seems there is no specific orientation. House Sparrows or Starlings frequently nest in some holes of the colonies in sand pits.

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