The beach areas provide fragile ecosystems for birds whose populations have already been impacted by development, so Holgate is closed to all public during the nesting season; Little Beach is closed all year except by special permit for research or education. Almost 90% of Forsythe Refuge is tidal salt marsh, interspersed with shallow coves and bays. Each year thousands of ducks and geese, wading birds and shorebirds concentrate here during spring and fall migration, making the Refuge a good site for birdwatching, nature photography and related activities. More than 3,000 acres (12 km2) of the Refuge are woodlands with a wide variety of tree and plant species, thus also providing vital habitat for a variety of upland species such as songbirds, woodcock, white-tailed deer and box turtles.