green heron perched on branch on top of lily pads as bird flies by in everglades swamp marsh slough wetland habitat

green heron wetland wading bird everglades wetlands heron wildlife branch swamp marsh ornithology avian everglades national park butorides bird pond birds beak florida national park ecosystem virescens nature animal slough stalking fauna background natural wilderness wing water feathers little national green wild feather outdoors outdoor usa tropical park great summer travel america blue white