Winter counts from 2010 and 2011 were sent by Elchin Sultanov of the Azerbaijani Academy of Science (AOS).
An additional count from the July 2011 census and a number of January 2012 counts were sent by Stephanie Tyler of Birdlife Botswana.
Winter counts from 2010 and 2011 were sent by Leho Luigujoe of the Institute of Agricultural and Environmental Sciences, Estonia University of Life Sciences.
Counts from 2008 were sent by Mihret Ewnetu from the Ethiopian Wildlife Conservation Authority.
Counts from January 2012 were sent by Tareq Qaneer of the Royal Society of the Conservation of Nature (RCSN).
January counts from 2005-2010 were sent by Chas Holt of the British Trust for Ornithology (BTO)
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