(c) Kevin Kozlowski, all rights reserved

Great Blue Heron

(c) Josiah H., some rights reserved (CC BY-NC)

Green Heron

VS

Both herons inhabit the waters of Great Falls National Park, but the Great Blue Heron is much larger with pale blue-gray plumage, while the Green Heron is smaller and more compact with dark greenish upperparts and chestnut underparts.