Birds fallen at Danish Lighthouses 1883 through 1939

This dataset presents occurrence records and notes of birds extracted from the multiple volumes of “Fuglene ved de danske Fyr 1883-1939” (i.e. “Birds at the Danish Lighthouses 1883-1939”).The dataset was created firstly by digitizing the book volumes "Fuglene ved de danske Fyr" into PDF files, OCR-ing the PDF files and finally extracting relevant data and compiling them in a database file. In the period 1883-1939, there were 45 lighthouses and lightships functioning in Denmark. This dataset contains specific occurrence records and notes on bird species that struck 2 of these, namely Lodbjerg Fyr and Hanstholm Fyr. The dataset covers records from during the nights of bird migration period from the years 1886 through 1939 (there were no occurrence records or notes on Lodbjerg Fyr and Hanstholm Fyr between 1883- 1885 and 1887-1888). A total of 1212 records were generated with 742 records from Lodbjerg Fyr and 470 records from Hanstholm Fyr. A detailed description of the sampling and digitization process may be found at: http://danbif.dk/se-eksempler/fyrfaldne-fugle/.

The two specific lighthouses Lodbjerg Fyr and Hanstholm Fyr were selected for extraction from the book volumes through a suggestion from the Thy National Park, Denmark (http://nationalparkthy.dk/). They wanted to use these specific occurrence data for an exhibition project. This databasing effort has been co-funded by Thy National Park and DanBIF.

Future projects could include to extract data on more lighthouses from these digitized book volumes, all available at http://danbif.dk/se-eksempler/fyrfaldne-fugle/.

The number of specimens of the fallen birds that were sent by light keepers to the Zoological Museum of Copenhagen was also recorded in this dataset. These birds were carefully preserved and catalogued by collection workers at the museum and the specimens can still be found there today. Observations on weather conditions during nights when birds were observed by light keepers were also included.

Data from this dataset were extracted from “Report on Birds in Danmark, 1886” (published by Ornis) and Fuglene ved de danske Fyr volumes (published in Videnskabelige Meddelelser fra den Naturhistoriske Forening i København). Most of the book volumes were compiled by Herluf Winge (1857-1923), a Danish zoologist who studied mammalian dentition. After the early death of his brother, Oluf Winge (1855-1889), who was a leading Danish ornithologist at his time, Herluf helped to compile "Fuglene ved de danske Fyr": Birds at the Danish Lighthouses 1891-1910 and until 1912 he supplemented this with his own bird observations.

本数据集收录了自1883年至1939年间，从《丹麦灯塔鸟类1883-1939》（即《丹麦灯塔鸟类》）多卷本中提取的鸟类出现记录及注释。该数据集的构建首先通过对《丹麦灯塔鸟类》一书进行数字化处理，将其转化为PDF文件，然后进行光学字符识别（OCR），最终从相关数据中提取并编纂至数据库文件中。在1883-1939年间，丹麦共有45座灯塔和灯船在役。本数据集涵盖了特定鸟类物种撞击其中的两座灯塔，即洛德贝格灯塔和汉斯托尔姆灯塔的详细出现记录及注释。该数据集覆盖了从1886年至1939年间鸟类迁徙期间的夜间记录（1883-1885年及1887-1888年间，洛德贝格灯塔和汉斯托尔姆灯塔并无出现记录或注释）。总计生成1212条记录，其中洛德贝格灯塔742条，汉斯托尔姆灯塔470条。有关采样和数字化过程的详细描述可参见：http://danbif.dk/se-eksempler/fyrfaldne-fugle/。

丹麦国家公园（http://nationalparkthy.dk/）的建议下，选取了洛德贝格灯塔和汉斯托尔姆灯塔这两座特定灯塔的记录进行提取，以用于展览项目。此项数据库建设得到了丹麦国家公园和DanBIF的共同资助。

未来项目可能包括从这些数字化书籍卷轴中提取更多灯塔的数据，所有内容均可在http://danbif.dk/se-eksempler/fyrfaldne-fugle/找到。

此外，本数据集还记录了灯塔守卫者送至哥本哈根动物博物馆的坠落鸟类标本数量。这些鸟类标本由博物馆的收藏工作者精心保存和编目，至今仍可在博物馆找到。同时，还包含了灯塔守卫者在观察鸟类时的夜间天气状况记录。

本数据集的数据来源于《丹麦鸟类报告，1886年》（由Ornis出版）以及《丹麦灯塔鸟类》卷本（由哥本哈根自然历史协会的科学通报出版）。大多数书籍卷本由丹麦动物学家赫尔卢夫·温格（1857-1923）编纂，他研究了哺乳动物的牙齿。在温格的弟弟、当时的丹麦杰出鸟类学家奥卢夫·温格（1855-1889）早逝后，赫尔卢夫协助编纂了《丹麦灯塔鸟类》：1891-1910年及至1912年，他补充了自己的鸟类观察。