“Call”-ing all birders! Celebrate World Migratory Bird Day by going on a bird hike with a ranger to observe the birds that live in the park. Bring your own binoculars if you have them; the park has a limited number of binoculars. Meet at the Beaver Marsh Loop Trailhead in the Rogues Harbor upper parking lot. Day use fees apply ($3 per Maryland residents; $5 per out-of-state residents).