grey heron, ardea cinerea. blackford pond, edinburgh

africa animalia ardea ardeidae artificial asia aves bird birding blackford chordata cinerea edinburgh europe eutrophic family freshwater glacial grey heron hollow hunting lakes longlegged marshes nature pelecaniformes pond ponds predatory prey reserve rivers scotland shallows sport spring stalking standing stationary swim swimming the urban victorian wading water wetlands wildfowl wildlife