Great Blue Heron walking along top of waterfall, Hoover Dam, Westerville, Ohio

great blue heron perched waterfall hoover dam westerville ohio wildlife bird watching nature wetlands bird species water feature aquatic environment natural habitat feathered creature avian beauty heron observation urban wildlife ohio wildlife tranquil scene riverbank heron behavior waterflow scenic landscape wildlife conservation bird sanctuary serene moment urban oasis small waterfall hooper dam location natural wonder urban nature ohio landmark heron on waterfall westerville birdwatching hooper dam nature aquatic ecosystem spotting photography dusk