As in 2000, about 60% of all sites had no young, with only 50% of the sites occupied by breeding pairs being productive (i.e. having young to approximately fledging age; Fig.
100 de tous les sites, et seulement 50 p. 100 des sites occupÃ©s par un couple reproducteur Ã©taient productifs (c.-Ã -d., avoir des oisillons approxima-tivement d'un Ã¢ge Ã s'envoler; figure 32).