Swan census / Censo dos cisnes

***************************************************************************************************************************************** Um cisne, em Maidenhead, Inglaterra, está entre as aves contadas no Censo Swan Upping, uma tentativa anual de contar a população de cisnes nos limites do Tâmisa. O Censo data do século 12.

A swan in Maidenhead, England, is among birds counted during the Swan Upping Census, an annual attempt to count the swan population on stretches of the Thames. The census dates from the 12th century.