Trends in wintering shorebirds and anatids in Brittany

Digital trends of wintering shorebirds and anatids in Brittany. The collection of this data is part of the Wetlands International network. **Sources:** ornithologists from Breton associative networks (BV-Sepnb, Geoca, Gob, LPO,...) or institutional networks (ONCFS, natural space managers,...) participate in the Wetlands dynamic. The coordination of actors, data and their compilation is done by the Regional Observatory of Avifauna (ORA). **Notes:** observations of shorebirds, anatids and rallids frequenting coastal wetlands (marsh, foreshore) and interior wetlands (lake, ponds) are carried out annually, in mid-January over one day. For some species, the numbers observed in this context are not always representative of the populations present in mid-January in Brittany: either because of the difficulty of detecting species preferentially frequenting the marine environment (e.g. harle-uppé or scoters); or from the ecology of species frequenting in number other environments than the wetlands identified (e.g. golden plover, lantern). Some sites that are very inaccessible in winter are not systematically identified and therefore do not regularly provide data on their sector of attachment. Winter climatic hazards can disrupt the phenology of waterbirds in Brittany, or even in France. Thus, the Wetlands census on a single day in January, even with some latitude on the date, may not accurately represent the average situation between December and February. **Go further :** consult the article <a href="https://bretagne-environnement.fr/article/tendances-limicoles-anatides-hivernants-bretagne" target="_blank">"Digital trends of shorebirds and anatids wintering in Brittany"</a> carried out by the Regional Observatory of avifauna.**布列塔尼越冬鸻鹬类（shorebirds）与鸭科鸟类（anatids）数字化趋势**。本数据集的采集工作隶属于国际湿地（Wetlands International）网络体系。 **数据来源：** 布列塔尼地区的鸟类学家通过协会网络（BV-Sepnb、Geoca、Gob、LPO等）或机构网络（法国国家狩猎与野生生物办公室（ONCFS）、自然空间管理者等）参与湿地动态监测工作。相关数据的统筹协调与整理汇编工作由鸟类区域观测站（Regional Observatory of Avifauna，ORA）负责。 **说明：** 本项目每年于1月中旬开展单日调查，记录栖息于沿海湿地（沼泽、潮间带）与内陆湿地（湖泊、塘堰）的鸻鹬类、鸭科鸟类与秧鸡科鸟类（rallids）的相关信息。针对部分物种而言，此次调查中观测到的种群数量未必能准确代表布列塔尼地区1月中旬的实际种群规模：其一是难以侦测偏好海洋生境的物种（如丑鸭（harle-uppé）、海番鸭（scoters））；其二是受大量栖息于非划定湿地生境的物种的生态习性影响（如金斑鸻（golden plover）、lantern）。部分冬季难以抵达的调查点位未被系统纳入监测范围，因此无法定期提供其所属区域的相关数据。冬季气候灾害可能扰乱布列塔尼乃至全法国水鸟的物候节律。因此，即便在调查日期上留有一定弹性，1月单日的湿地普查结果也未必能准确反映12月至2月间的平均种群状况。 **拓展阅读：** 可查阅由鸟类区域观测站（Regional Observatory of Avifauna）发布的《布列塔尼越冬鸻鹬类与鸭科鸟类数字化趋势》一文，链接：<a href="https://bretagne-environnement.fr/article/tendances-limicoles-anatides-hivernants-bretagne" target="_blank">https://bretagne-environnement.fr/article/tendances-limicoles-anatides-hivernants-bretagne</a>