Elchin Sultanov of the Azerbaijan Academy of Sciences, Institute of Zoology provided winter counts for the 2011-2012 season.
Stephanie Tyler of Birdlife Botswana provided additional July 2012 counts.
John Wilson of the Wildlife and Environmental Society of Malawi provided counts for July 2012.
Holger Kolberg from the Namibian Ministry of Environment and Tourism provided counts for July 2012.
Elchin Sultanov of the Azerbaijan Academy of Sciences, Institute of Zoology provided winter counts for the 2011-201 season.
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