Reconnaissance flight polygon flown 2020 March 08 as kml: Spectacled eider winter aerial survey 2020

Polygon searched during the 2020 March 08 aerial reconnaissance flight searching for large flocks of spectacled eiders outside of the original survey area (as a kml file). Transects flown in this polygon were not part of the survey used to count spectacled eiders, but an ad hoc addition and did not result in any new data collected as no large flocks were located confirming that very large flocks that had been seen during previous winter surveys were not present in the or near the survey area in 2020. Polygon was delineated by Dave Safine based on observations from 2020 March 03-04 when flocks were near the eastern edge of the survey polygon.

本数据集包含2020年3月8日航空侦察飞行所覆盖的多边形区域（以KML（Keyhole标记语言）文件形式提供），该区域位于原始调查范围之外，用于搜寻大型眼镜绒鸭（spectacled eider）种群。在此多边形区域内布设的飞行样带并非用于计数眼镜绒鸭的官方调查航线，而是临时追加的飞行路径；本次飞行未采集到任何有效数据，原因是未发现任何大型绒鸭群，这一结果证实：2020年，调查区域及其邻近区域并未出现过往冬季调查中记录的大型绒鸭种群。该多边形区域由戴夫·萨法恩（Dave Safine）根据2020年3月3日至4日的观测结果划定，当时观测到的绒鸭群位于该调查多边形区域的东缘附近。