Aves, p�le ornithologique de Natagora

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Aves, 17/3-4 | 1980 | 57-71

  Census of the Grey Wagtail (Motacilla cinerea), the Dipper (Cinclus cinclus) and the Kingfisher (Alcedo atthis) on walloon rivers in 1978 and 1979.
De Liedekerke, R.

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Article summary

A census of the Grey Wagtail, the Dipper and the Kingfisher was carried out in different walloon regions (Belgium) during the Springs of 1978 and 1979. Approximately 313 Km of rivers were covered. As far as the Grey Wagtail is concerned, the density varies a great deal, even within the same region, ranging from less than 1 to more than 14 pairs on 10 Km. The Dipper's density reaches 10 to 11,5 pairs on 10 Km on the rivers that have the most Wagtails; elsewhere, its density most often ranges from 2 to 4 pairs on 10 Km. But an abnormal and unexplained absence of the species has been noted on the three rivers prospected in the Entre-Sambre-et-Meuse. The very poor results concerning the Kingfisher (only 6 pairs recorded) merely confirm the rarity of this species and its sensitivity to severe Winters.

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