Flyover two blue herons standing in creek bed below reservoir spillway, Hoover Reservoir, Ohio

aerial view wildlife dam bird great blue heron perched rock formation natural habitat wetland ecosystem water body hoover reservoir westerville oh biodiversity conservation protected area birdwatching ornithology avian behavior ecology outdoor recreation environmental awareness natural beauty bird conservation freshwater wetlands migratory birds nature reserve wetland conservation bluesky background wildlife sanctuary aquatic birds waterfowl wild birds ohio natural resources ohio bird species midwest wildlife ohio outdoors ohio wetland birds north american wildlife hunting spillway