Pooling robustness in distance sampling: Avoiding bias when there is unmodelled heterogeneity

Data from a two-visit line transect survey of four songbird species gathered in spring 2004. Study area size was 33.2 ha of woodland and parkland on the Montrave Estate near Leven in Fife, Scotland., Line transect distance sampling methods., The file is in comma-separated values (CSV) format. The flat text file can also be opened using spreadsheet software.本数据集源自2004年春季开展的两次访问线路样带调查，共收录4种鸣禽（songbird）的相关数据。调查区域位于苏格兰法夫郡莱文镇附近的蒙特拉夫庄园（Montrave Estate），总面积达33.2公顷，涵盖林地与公园绿地两类生境。本次调查采用线路样带距离抽样法。该数据集文件采用逗号分隔值（CSV）格式，此类纯文本文件亦可通过电子表格软件打开。