Abstract Regular surveys of Great Blue Heron Ardea herodias colonies in Quebec, conducted between 1977 and 2001, resulted in the discovery of 705 colonies, mostly in the western part of the province.
Résumé Les relevÃ©s rÃ©guliers de colonies de Grands HÃ©rons (Ardea herodias) effectuÃ©s au QuÃ©bec entre 1977 et 2001 ont permis de dÃ©couvrir 705 colonies, la plupart dans l'ouest de la province.