Bird observationsDistance sampling data of birds at three drylands locationsIndexObservation numberNumericnumber Bird observationsDistance sampling data of birds at three drylands locationsSiteBe, Bl or Ca indicating Bendigo, Blackstone or Cambrian Hills study siteText Bird observationsDistance sampling data of birds at three drylands locationsBlockBlock within study site, dominated by one of three vegetation types on a gradient of woodiness. g, i or s indicate grassland, intermediate (mixed grassland and shrubland), or shrublandText Bird observationsDistance sampling data of birds at three drylands locationsTransectTransect number within block. 1-5, with numbers of transects differing between blocks and between sitesNumericnumber Bird observationsDistance sampling data of birds at three drylands locationsTrans length this sampleTransect length. Each transect was surveyed (sampled) multiple times on different days. Most transects were sampled 3 times, once on each of 3 different days. CaBiT1 (Cambrian Block i Transect 1) was sampled only twiceNumericmetre Bird observationsDistance sampling data of birds at three drylands locationsTotal Trans length surveyedThe total length surveyed for each transect, equal to the product of its length and the number of times it was surveyedNumericmetre Bird observationsDistance sampling data of birds at three drylands locationsSpecies codeTwo- or three-letter code identifying bird species. See 'Bird species' table for list of codesText Bird observationsDistance sampling data of birds at three drylands locationsPerp distancePerpendicular distance from the transect line to the bird (or to a nearby object if the bird was flying). This distance was calculated from the distance and angle to the bird. Blank indicates not recordedNumericmetre Bird observationsDistance sampling data of birds at three drylands locationsNumberNumber of birds in each observation (flock size)Numericnumber Bird observationsDistance sampling data of birds at three drylands locationsSeen or HeardS or H indicating whether the bird was seen or heard. Blank indicates not recordedText Bird observationsDistance sampling data of birds at three drylands locationsBehaviourF, P or S indicating whether the bird was flying, perching or singing. Blank indicates not recordedText Bird observationsDistance sampling data of birds at three drylands locationsObserverA, B, C or D indicating different observersText Bird observationsDistance sampling data of birds at three drylands locationsStartTimeTime of day when transect was begun. Text field in format hh:mmDatetime Bird observationsDistance sampling data of birds at three drylands locationsEndTimeTime of day when transect was finished. Text field in format hh:mmDatetime Bird observationsDistance sampling data of birds at three drylands locationsCloudCloud cover on a scale from 0-5. Blank indicates not recordedNumericnumber Bird observationsDistance sampling data of birds at three drylands locationsWindAverage windspeed. Blank indicates not recordedNumerickilometresperhour Bird observationsDistance sampling data of birds at three drylands locationsDateDate of sample. Text field in format yyyy-mm-ddDatetime Bird observationsDistance sampling data of birds at three drylands locationsDay of tripDay number within sampling trip. 1-3 at Be and Be, and 1-4 at CaNumericnumber Bird observationsDistance sampling data of birds at three drylands locationsSample No.Sample number for each transect. In most cases, each day that a transect was sampled resulted was a new sample. The exception was CaBiT2 (Cambrian Block i Transect 2), where because of bad weather sampling was halted partway along the transect on 2008-02-10, and was completed on the next day (2008-02-11) Numericnumber Vegetation heightAverage height of vegetation on each transectSiteBlockTrSite (Be,Bl,Ca), Block (Bg, Bi, Bs) within Site, and Transect (T1-T6) within Block. Site, Block and Transect are defined in the metadata for Bird observationsText Vegetation heightAverage height of vegetation on each transectAvHeightAverage height of vegetation on this transect. Vegetation measurement method is given in Wilson et al. 2014Numericmetre Bird speciesBird species codes and common namesSpecies codeTwo- or three-letter code identifying bird species, used in Bird observations dataText Bird speciesBird species codes and common namesSpecies nameBird species common nameText