Aves, p�le ornithologique de Natagora

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Aves, 43/1 | 2006 | 57-62

  Double nesting attempt of Marsh Harrier (Circus aeruginosus) in cultivated fields of western Hainaut.
Derume, M.

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Article summary

During the spring of 2005, a pair of Marsh Harriers (Circus aeruginosus) attempted to nest twice in the agricultural plain of western Hainaut. After a first breeding site desertion following an inevitable human disturbance, the pair relocated itself within 3 kilometres to the south-west of the first site and undertook a second nesting attempt. At the first site, the nest was discovered in a piece of raygrass (Lolium sp.); it was almost exclusively made up of dried mustards. The second nesting, in a corn field, failed approximately at mid-incubation, perhaps because of the inexperience of the pair or the predation by Carrion crows. Although breeding in cultivated fields has become rather frequent in Flanders and in certain areas of France and the Netherlands, these are yet the first cases of such breeding in the Walloon Region.

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