NDFF Bat survey by transects

This monitoring program counts night-flying bats. A route with at least 20 points and transacts, the distance between 2 points, is set out through a more or less homogeneous landscape. The points need to be at least 400 metres apart, so the route has a minimum length of 8 kilometres, performed on bike.
The observable bats are counted with a bat detector every month from April to September along the route, both on the points and on the transacts. This mainly concerns species that can be easily identified using a bat detector, no recording device. A small number of participants have a recording device, in which case they can also report species that are hard to identify.
Dataset available via https://www.ndff.nl/english / [e-mail]
Positive observations without zeros.
7,033 records (March 2018)
https://www.ndff.nl/overdendff/validatie/protocollen/17-206-meetnet-punt-transecttellingen-vleermuizen/

本监测项目针对夜间飞行的蝙蝠开展种群计数工作。本次监测设定一条包含至少20个监测点与样带的线路，线路覆盖的景观类型相对均一。各监测点间距不小于400米，因此该线路的最小长度为8公里，监测活动以骑行方式完成。
每年4月至9月，每月需沿该线路在监测点及样带上使用蝙蝠探测器（bat detector）对可见蝙蝠进行计数。本次监测主要针对可通过蝙蝠探测器直接识别的物种，无需借助录音设备；少数配备录音设备的参与者，则可上报难以直接识别的蝙蝠物种。
本数据集可通过https://www.ndff.nl/english 获取，或联系邮箱[e-mail]咨询。
数据集仅收录有效观测记录，不含零值条目。
截至2018年3月，本数据集共计7033条记录。
相关监测验证规范可参考：https://www.ndff.nl/overdendff/validatie/protocollen/17-206-meetnet-punt-transecttellingen-vleermuizen/