This represents a 242 000 ha (28%) reduction in the amount of suitable habitat thought to occur historically, of which about one-third of this has been permanently lost from the lower Fraser River Valley (Blackburn and Godwin 2003).
Aujourd’hui, on estime qu’il reste environ 639 000 ha (48 % du total des zones boisées adéquates historiques) d’habitat convenable dans les deux circonscriptions.