The nation with the highest number of sites is the United Kingdom at 169 ; the nation with the greatest area of listed wetlands is Canada , with over 130,000 km2 ( 50,000 sq mi ) , including the Queen Maud Gulf Migratory Bird Sanctuary at 62,800 km2 ( 24,200 sq mi ) .
The nation with the greatest area of listed wetlands is Canada , with over 130,000 km ² , including the Queen Maud Gulf Migratory Bird Sanctuary at 62,800 km ² .