West European hedgehog (Erinaceus europaeus) records in Great Britain from four citizen science surveys analysed in Wembridge et al. West European hedgehog (Erinaceus europaeus) decline in Great Britain: evidence from multiple national scale surveys. Ecology and Evolution (submitted)

Field details within files: BBS_data.csv Gridref: Ordnance Survey grid reference (Ikm2 grid square); year: survey year hhog_C: detection type is count (1 – yes, 0 – no); hhog_D: detection type is dead (1 – yes, 0 – no); hhog_F: detection type is field sign (1 – yes, 0 – no); hhog_S: detection type is seen on additional vists (1 – yes, 0 – no); hhog_L: detection type is local knowledge (1 – yes, 0 – no); hhog_U : detection type is unknown (1 – yes, 0 – no); hhog: presence/absence of hedgehogs GBW_data.csv Site: uniquely identifies a survey site; year: survey year week: week number of year (i.e., 1–52)’ count: maximum weekly count’ hhpres: presence/absence of hedgehogs; north: British National Grid northing value of survey site; east: British National Grid northing value of survey site; nmammals: number of mammal species recorded LwM-data.csv LwM: observations of hedgehog at sites within the built environment (predominantly domestic gardens) from sightings or field signs, collected from 2003 to 2024. Data identify location and date of observations; total observation time for year x site combination; percentage surface cover of vegetation types; and site features that are present. usi!: uniquely identifies survey site site! year!: survey year season!: spring, autumn, other From 2003 to 2019 inclusive, observations were recorded in a single 13-week period starting on the Monday closest to 01 April. Weeks run Monday to Sunday (corresponding to ‘spring’). In 2020,observations were recorded in two 13-week periods, the first starting on Monday 30 March (‘spring’), and the second, on Monday 31 August (‘autumn’). From Monday 29 March 2021, constraints on when data were collected were removed (i.e., records could be submitted for any week). Since then, the survey has run throughout the year. ndawn: number of weeks with observation effort at dawn nday: number of weeks with observation effort during the day ndusk: number of weeks with observation effort at dusk nnight: number of weeks with observation effort during the night ‘Dawn’ is defined as one hour before or after sunrise; ‘day’, as one hour after sunrise to one hour before sunset; ‘dusk’, as one hour before sunset to one hour after sunset; ‘night’, as one hour after sunset to one hour before sunrise. Nall: total number of weeks with observation effort sumDawn: total observation effort at dawn (minutes) sumDay: total observation effort at day (minutes) sumDusk: total observation effort at dusk (minutes) sumNight: total observation effort at night (minutes) For each period (e.g., dawn, day, etc.), observation time was recorded as one of five categories: less than a minute; 1-10 minutes; 11-30 minutes; 31-60 minutes; and 60+ minutes. To sum effort across weeks, the mid-value of these categories was used. nshhog: number of weeks with hedgehog signs nwhhog: number of weeks with hedgehog sightings (maximum counts) sumhhog: sum of weekly maximum counts grass!: percentage cover of the survey site that is grass shrub!: percentage cover of the survey site that is shrubs tree!: percentage cover of the survey site that is trees conc!: percentage cover of the survey site that is concrete/gravel/paving shed!: percentage cover of the survey site that is shed/hut/building flow!: percentage cover of the survey site that is flowerbed/cultivated wild!: percentage cover of the survey site that is untended/’wild’ siteshed: presence of a shed on the site sitepond: presence of a pond on the site sitebat: presence of a bat roost box on the site sitehhog: presence of a hedgehog nest box on the site sitebird: presence of a bird nest box on the site sitecomp: presence of a compost pile on the site sitepile: presence of a wood pile on the site sitebtab: presence of a bird table on the site sitebbath: presence of a bird bath on the site sitbfeed: presence of a bird feeder on the site siteofeed: presence of a other feeder on the site siteoriver: presence of a water course on the site MoR_data.csv bservations of west Eurpean hedgehog casualties recorded on road journeys from 2001 to 2013. Data identify location and date; distance surveyed; end- and start locations of journey; number of hedgehogs; and survey platform (paper-based or digital). Field details: journey : uniquely identifies a record; date: journey date; miles: journey distance (mi); north: British National Grid northing value of journey start point; east: British National Grid easting value of journey start point; endnorth: British National Grid northing value of journey endpoint; endeast: British National Grid easting value of journey endpoint n_hedgehog: number of hedgehogs recorded; source: paper; phone (mobile device); online (webpage) year: journey year文件内字段详情： ### BBS_data.csv Gridref：英国地形测量局（Ordnance Survey）网格坐标（1平方千米网格区块）； year：调查年份； hhog_C：检测类型为计数（1表示存在，0表示不存在）； hhog_D：检测类型为死亡（1表示存在，0表示不存在）； hhog_F：检测类型为野外痕迹（1表示存在，0表示不存在）； hhog_S：检测类型为额外访问时所见（1表示存在，0表示不存在）； hhog_L：检测类型为本地知识（1表示存在，0表示不存在）； hhog_U：检测类型为未知（1表示存在，0表示不存在）； hhog：刺猬存在/缺失情况。 ### GBW_data.csv Site：唯一标识调查站点； year：调查年份； week：一年中的周数（即1–52）； count：周最大观测计数； hhpres：刺猬存在/缺失情况； north：调查站点的英国国家网格（British National Grid）北向坐标值； east：调查站点的英国国家网格东向坐标值； nmammals：记录的哺乳动物物种数量。 ### LwM-data.csv LwM-data.csv收录了2003年至2024年间收集的刺猬观测数据，观测地点为建成环境内的站点（以家庭花园为主），数据来自目击记录或野外痕迹。内容包含观测地点与日期、年度-站点组合的总观测时长、植被类型的地表覆盖百分比，以及站点现存设施特征。 usi!：唯一标识调查站点； site!：站点标识； year!：调查年份； season!：季节（春季、秋季、其他）。 2003年至2019年（含首尾年份），观测仅在一个13周周期内进行，该周期始于最接近4月1日的周一，每周时段为周一至周日（对应‘春季’）。2020年，观测分为两个13周周期：第一个周期始于3月30日周一（对应‘春季’），第二个周期始于8月31日周一（对应‘秋季’）。2021年3月29日起，取消观测时段限制（即可提交任意周的记录），此后调查全年开展。 ndawn：黎明时段开展观测的周数； nday：日间开展观测的周数； ndusk：黄昏时段开展观测的周数； nnight：夜间开展观测的周数。 其中，‘黎明’定义为日出前后各1小时；‘日间’为日出后1小时至日落前1小时；‘黄昏’为日落前1小时至日出后1小时；‘夜间’为日落后1小时至日出前1小时。 Nall：总观测周数； sumDawn：黎明时段总观测时长（分钟）； sumDay：日间总观测时长（分钟）； sumDusk：黄昏时段总观测时长（分钟）； sumNight：夜间总观测时长（分钟）。 针对每个时段（如黎明、日间等），观测时长被划分为5个类别：不足1分钟；1-10分钟；11-30分钟；31-60分钟；60分钟以上。为跨周累计观测时长，采用各分类的中间值进行计算。 nshhog：出现刺猬痕迹的周数； nwhhog：出现刺猬目击记录（含最大计数）的周数； sumhhog：周最大计数总和。 grass!：调查站点的草地覆盖百分比； shrub!：调查站点的灌木覆盖百分比； tree!：调查站点的树木覆盖百分比； conc!：调查站点的混凝土/碎石/铺装地面覆盖百分比； shed!：调查站点的棚屋/小屋/建筑物覆盖百分比； flow!：调查站点的花坛/耕地覆盖百分比； wild!：调查站点的未打理/‘野生’区域覆盖百分比。 siteshed：站点是否设有棚屋； sitepond：站点是否设有池塘； sitebat：站点是否设有蝙蝠箱； sitehhog：站点是否设有刺猬巢箱； sitebird：站点是否设有鸟巢箱； sitecomp：站点是否设有堆肥箱； sitepile：站点是否设有木堆； sitebtab：站点是否设有鸟食台； sitebbath：站点是否设有鸟浴盆； sitbfeed：站点是否设有鸟类喂食器； siteofeed：站点是否设有其他喂食器； siteoriver：站点是否设有水道。 ### MoR_data.csv MoR_data.csv收录了2001年至2013年间通过道路行程记录的西欧刺猬路杀伤亡数据。内容包含观测地点与日期、 surveyed距离、行程的起点与终点、刺猬数量，以及调查平台（纸质版或数字版）。 字段详情： journey：唯一标识单条记录； date：行程日期； miles：行程距离（英里）； north：行程起点的英国国家网格北向坐标值； east：行程起点的英国国家网格东向坐标值； endnorth：行程终点的英国国家网格北向坐标值； endeast：行程终点的英国国家网格东向坐标值； n_hedgehog：记录的刺猬数量； source：数据来源（纸质版、手机（移动设备）、在线（网页））； year：行程年份。