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Kolberg, H. 2011. Trends in Namibian Waterbird Populations 4: Herons and Egrets Part 1. Lanioturdus, 44(2): 12-15


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Trends in Namibian Waterbird Populations 4: Herons and Egrets Part 1.

Summary / Notes:

This article continues the series on trends in Namibian waterbird populations and summarises count data for herons and egrets for the period 1977 to December 2008. For each species the Red Data Book (RDB) status, both global and Namibian, is given, the population trend as per Wetlands International, the number of times the species was counted, the number of times it has passed the 1% population criterion, the maximum count and the sites where it has passed the 1% population criterion. The local trend is calculated for the period 1991 to 2008 only because continuous data is available for that time. The computer programme TRIM was used for these analyses (see an earlier publication for the selection criteria and methods).(Lanioturdus 43(2) - Ed).

Year: 2011

Type: Journal Article

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