Rottnest Island lakes, swamps and coastal bird counts December 1981 to September 2007

The salt lakes and swamps of Rottnest Island were surveyed by two observers, who between them walked round all the lakes and swamps (see figure of lakes and swamps below), with the exception of Barker Swamp, in the centre of the island. All birds, except Silver Gulls, seen around or on the lakes and swamps were identified and counted. The coastal surveys was conducted by one observer who drove round the island, stopping at 32 vantage points (see figure of observation locations below), from which observations were made with the aid of a telescope on a tripod and binoculars. All birds (with the exception of Silver Gulls) were identified and counted. Any species seen that were not initially identified were approached to identify them. Three complete surveys of birds of the coast were conducted between 24-27 September 1982, 21-23 September 1992 and 3-4 September 2007 by the same observer. These surveys commenced at the main jetty on Thomson Bay and involved walking anti-clockwise around the island; a distance of 37km. All beaches and cliff faces were traversed and the observer walked as close to the cliff edges as safety permitted. Counts were made of all non-terrestrial birds, with the exception of Silver Gull. These data on the birds of the salt lakes, swamps and coast of Rottnest Island were collected by Research Scientist Denis Saunders and Technical Officer Perry de Rebeira of CSIRO Division of Wildlife and Rangelands Research as part of research on island bird communities.

罗特内斯特岛（Rottnest Island）的盐湖与沼泽由两名调查员开展调查，二人共同遍历了该岛除中部巴克沼泽（Barker Swamp）之外的所有盐湖与沼泽（详见下文盐湖与沼泽分布图）。所有在盐湖、沼泽周边或水面活动的鸟类（银鸥(Silver Gull)除外）均被识别并计数。海岸调查由一名调查员驾车环岛开展，共停靠32个观测点位（详见下文观测点位分布图），调查过程中借助架设在三脚架上的望远镜与双筒望远镜开展观测。所有鸟类（银鸥除外）均被识别并计数；若遇初始无法识别的物种，则会靠近观测以完成物种鉴定。同一名调查员分别于1982年9月24日至27日、1992年9月21日至23日以及2007年9月3日至4日开展了三次完整的海岸鸟类调查。本次调查以汤姆森湾（Thomson Bay）主码头为起点，沿逆时针方向环岛步行，全程共计37公里。调查员遍历了所有海滩与崖壁区域，并在确保安全的前提下尽可能贴近崖壁边缘开展观测；统计对象为所有非陆生鸟类（银鸥除外）。本数据集所收录的罗特内斯特岛盐湖、沼泽与海岸鸟类数据，由澳大利亚联邦科学与工业研究组织（CSIRO）野生动物与牧场研究部的研究科学家丹尼斯·桑德斯（Denis Saunders）与技术专员佩里·德·雷贝拉（Perry de Rebeira）采集，作为岛屿鸟类群落研究的组成部分。