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<strong>Document</strong> d’Objectifs du site Natura 2000 « Massif de Fontainebleau »DIREN Ile-de-France – ONF- 153 -- 153 -
<strong>Document</strong> d’Objectifs du site Natura 2000 « Massif de Fontainebleau »DIREN Ile-de-France – ONFBlongios nain, Ixobrychus minutus (Linnaeus, 1766)Directive Habitats-Faune-Flore : Directive Oiseaux :O1P N : L R : C B : U I C N :P E B2Description / Ecologie :- Plus petit héron européen- Migrateur, présent de façon irrégulière entre mai et septembre- Longues pattes, long cou et bec très allongé.Niche par couples isolésHabitats :- Milieux humides touffus tels que les roselières- Ripisylves arbustives et herbacées- Berges des étangs naturels ou artificiels (gravières, anciennes carrières)Menaces :- Sécheresse sur les territoires d’hivernage- Pollution des eaux- Fermeture naturelle des roselières, variation de niveau d’eau- Dérangement des sites de nidification.Connaissances actuelles des populations :En France : population en chute libre depuis une trentaine d’années. Irrégulier aux passagesLocalisation au sein du site Natura 2000 de Fontainebleau:Plus de traces de nidification sur le siteNicheur au Marais de Larchant en 1989(SIBLET) et jusqu’en 1994 (ANVL, Synthèseornithologique). L’espèce est potentiellement nicheuse à Chanfroy.- 154 -
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