Drever, unpubl. data) assuming survival rates through three life stages (first winter survival rate of 0.273, second year survival rate of 0.5 and annual adult survival rate of 0.727; Butler 1995), an annual nesting productivity of 1.12 fledglings per active nesting attempt (R.
L’âge moyen des Grands Hérons du Pacifique reproducteurs en ColombieBritannique ainsi calculé est de 5,6 ans.