Aves, p�le ornithologique de Natagora

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Aves, 48/3 | 2011 | 153-171

  Ornithological interest and recent developments at the Hollogne-sur-Geer sedimentation ponds
Alain Jortay

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Article summary

215 species of birds have been observed at the sedimentation ponds of the Hollogne-sur-Geer sugar factory. The ponds offer a nesting place for several species on the Red List of threatened birds in Wallonia, notably the Black-necked Grebe Podiceps nigricollis (38 pairs), the Gadwall Anas strepera (10 pairs) and the Northern Shoveler Anas clypeata (1 pair), as well as other species of patrimonial interest such as the Bluethroat Luscinia svecica (2-4 pairs), and the Sedge Warbler Acrocephalus schoenobaenus (1-3 pairs).Over the last 16 years there have been various changes at the site, both quantitative (area extended from 25 ha to 41 ha) and qualitative (cessation of activity at the factory, development of the vegetation). These changes were favourable to the ducks, either over-wintering or migratory, nesting on the site (6 species). Numbers of post-breeding waders decline, but pre-breeding numbers increase. The development of the vegetation and the fact that some ponds are no longer dried out reduce the numbers of post-breeding visitors whereas the enlargement of the site and of the spring-time bare areas are stillfavourable to the pre-breeding season visits. Management measures should include the annual drying out, in summer, of some of the ponds, and the overall protection and development of the reedbeds.

Articles on the same species

Avocette élégante (Recurvirostra avosetta), Bécasse des bois (Scolopax rusticola), Bécasseau cocorli (Calidris ferruginea), Bécasseau de Temminck (Calidris temminckii), Bécasseau minute (Calidris minuta), Bécasseau tacheté (Calidris melanotos), Bécassine des marais (Gallinago gallinago), Bécassine sourde (Lymnocryptes minimus), Bergeronnette grise (Motacilla alba), Bergeronnette printanière (Motacilla flava), Bihoreau gris (Nycticorax nycticorax), Blongios nain (Ixobrychus minutus), Bruant des roseaux (Emberiza schoeniclus), Bruant jaune (Emberiza citrinella), Buse pattue (Buteo lagopus), Canard chipeau (Anas strepera), Canard colvert (Anas platyrhynchos), Canard pilet (Anas acuta), Canard siffleur (Anas penelope), Canard souchet (Anas clypeata), Chevalier aboyeur (Tringa nebularia), Chevalier arlequin (Tringa erythropus), Chevalier cul-blanc (Tringa ochropus), Chevalier gambette (Tringa totanus), Chevalier guignette (Actitis hypoleucos), Chevalier stagnatile (Tringa stagnatilis), Chevalier sylvain (Tringa glareola), Cisticole des joncs (Cisticola juncidis), Combattant varié (Philomachus pugnax), Echasse blanche (Himantopus himantopus), Faucon hobereau (Falco subbuteo), Faucon kobez (Falco vespertinus), Fauvette grisette (Sylvia communis), Foulque macroule (Fulica atra), Fuligule milouin (Aythya ferina), Fuligule morillon (Aythya fuligula), Gallinule poule-d'eau (Gallinula chloropus), Glaréole à ailes noires (Glareola nordmanni), Gorgebleue à miroir (Luscinia svecica), Grand Gravelot (Charadrius hiaticula), Grèbe à cou noir (Podiceps nigricollis), Grèbe castagneux (Tachybaptus ruficollis), Grive litorne (Turdus pilaris), Guifette leucoptère (Chlidonias leucopterus), Guifette noire (Chlidonias niger), Hirondelle rustique (Hirundo rustica), Huîtrier pie (Haematopus ostralegus), Huppe fasciée (Upupa epops), Locustelle luscinioïde (Locustella luscinioides), Loriot d'Europe (Oriolus oriolus), Marouette de Baillon (Porzana pusilla), Marouette ponctuée (Porzana porzana), Marouette poussin (Porzana parva), Martin-pêcheur d'Europe (Alcedo atthis), Martinet noir (Apus apus), Mouette mélanocéphale (Larus melanocephalus), Mouette rieuse (Chroicocephalus ridibundus), Oedicnème criard (Burhinus oedicnemus), Panure à moustaches (Panurus biarmicus), Petit Gravelot (Charadrius dubius), Phragmite des joncs (Acrocephalus schoenobaenus), Pigeon ramier (Columba palumbus), Pinson des arbres (Fringilla coelebs), Pipit à gorge rousse (Anthus cervinus), Pipit farlouse (Anthus pratensis), Râle d'eau (Rallus aquaticus), Rémiz penduline (Remiz pendulinus), Rousserolle turdoïde (Acrocephalus arundinaceus), Rousserolle verderolle (Acrocephalus palustris), Sarcelle d'été (Anas querquedula), Sarcelle d'hiver (Anas crecca), Tadorne de Belon (Tadorna tadorna), Tarier des prés (Saxicola rubetra), Tarier pâtre (Saxicola torquatus), Tarin des aulnes (Carduelis spinus), Tourterelle des bois (Streptopelia turtur), Vanneau huppé (Vanellus vanellus), Vanneau sociable (Vanellus gregarius)

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