Aves, p�le ornithologique de Natagora

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Aves, 36/1-3 | 1999 | 31-52

  Shrikes in the south of the Entre-Sambre-et-Meuse : study on the recent evolution of the breeding birds and data on habitat and reproduction.
Coppée, J.-L.

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Article summary

This study took place between 1991 and 1997. In 1990 10 territories at least of Red-backed Shrikes were observed but none of Great Grey Shrikes. The Great Grey Shrikes population looses 50% every ten years, which means that within 30 years the regression reaches 80-90% (see Tabel 1). Important habitat changes are the principal causes, hunting, rough winters (mid-eighties), pesticides and lack of food are others. On the other hand the Red-backed Shrike surprisingly has increased in this area for the last ten years (see Table 5 & 6). This is mainly due to an extension and restoration of favourable habitats : meadows acquisition for new nature reserves and conversion of fields into spruce or broad-leaved trees plantations (afforestations) are some of the favourable factors.