Philatelic Supplies lists these items for Mauritania
Mauritania 2012 Birds of Arguin Bank National Park (4v): Gt.White Pelican; W.Reef Heron; Grey Plover and Caspian Tern; this set is very elusive retailing at €50-60 and only offered on "Delcampe" website 21.95
List dated Nov 2017
Prices in GB Pounds

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