great blue heron in duckweed filled pond

great blue heron fishing pond filled duckweed middle summer colorado duckweek heron bird large fishing pond duckweed marsh swamp cover covered foraging closeup close habitat environment ecosystem open beak feathers feather plumage details eye yellow green greenery vegetation algae plants plant wading wading wildlife wild water nature colorful gray color bill mouth neck summer summertime animal herodias Ardea