Green Heron in flight - perhaps not the sharpest of the dozen or so I snapped while it was in the air, but the best illustration of the typical heron flight posture with neck folded into a tight "s" curve and the legs extended straight to the rear. The larger Great Blue Heron is sometimes mistaken for Sandhill Crane, but cranes fly with necks extended. This is an example of the sort of subtle cues by which a dedicated bird (or butterfly) watcher makes can sort out one species from another even over great distances and with a moving target.