Each page of the schedule was crossruled with 8 lines, capable of censussing 8 individuals.

Indeed, none of the recorded characteristics of buildings nor their location affected our counts of breeding Sparrows, which appeared to be distributed rather homogeneously across the urban areas we censused.

My initiation to waterfowl censussing took place in the early days of the A.W.E., as it is familiarly known, when I served as a junior to one of the ablest of the Witwatersrand pioneers, Royce Reed. The method used must remain one of the three basic methods of Transvaal waterfowl censussing, although it has certain inherent limitations.

For 14 individuals, eight censusses per daily period were performed within two weeks (32 censusses per individual), each time recording the coordinates of location. The territories of the individuals were defined as the area defended successfully against conspecifics by agonistic and/or non-agonistic behaviour, as described by Wickler (1969) and Nelissen (1976). The locations of the territories were determined from censussing; their sizes were estimated by behavioural observations.

Census

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