metadata.csv provides an overview of all observation rounds. disturbances.csv provides an overview of all disturbances. disturbance_frequency.csv provides an overview of observed and disturbed bird numbers, bird-hours and disturbance frequencies. Alphabetical list of column names BirdHours: Bird-hours (observed birds x duration of observation) BirdSpecies: Bird species (see below for categories) BirdsDisturbed: Number of birds disturbed BirdsPresent: Number of birds present at time of disturbance DisturbedBirds_Sum: Sum of disturbed birds DistFrequency: Disturbance frequency of the average bird per hour DistSource: Disturbance source (see below for categories) EndTime_UTC: End of observation round in UTC FlightDistance_m: Flight distance following disturbance in meter FlightDuration_s: Flight duration following disturbance in seconds HTR: High tide roost sites (see below for categories) Observer: Observer code of observer of disturbance Observers_n: Number of observers ObsRound: Identifier of Observation Round ObsTime_h: Time during which bird species was observed in hours StartTime_UTC: Start of observation round in UTC Time_UTC: Time of disturbance in UTC Waterheight_cmNAP: Water height at moment of disturbance in cm Amsterdam Ordnance Datum (NAP) Disturbance sources Anthr_Land: Anthropogenic disturbance source on land (e.g. walker, car) Natural: Natural disturbance (raptor or unknown (presumably raptor) A_Civil: Small civil aircraft A_Jet: Jet fighter without additional activity A_Jet_Gun: Jet fighter firing guns A_Jet_Bomb: Jet fighter throwing explosive bombs A_Heli: Military helicopter A_Transport: Transport aircraft High tide roost sites T: Tankdoel (M1) N: Nulpunt (M2) K: Kroonpolders (M3) V: Volharding (R1) W: Westerse Veld (R2) Bird species BTG: Bar-tailed godwit CUR: Curlew OYC: Oystercatcher GUL: Gulls