This is a good location for a variety of marsh birds, but the noise from passing vehicles on CR 2 can make hearing difficult during much of the day. The best times to visit this site, therefore, are in early morning and later in the evening, even after dark.

Virginia Rail, Sora, American Bittern, Northern Harrier, Alder and Willow flycatchers and Marsh Wren are all regular. Sandhill Crane nests in the Birdsall Wildlife Area to the south of CR 2 and is occasionally seen in the marsh, as are Black Terns which occasionally forage in the marsh but nest to the south in marshes along Rice Lake at the mouths of Birdsall Creek and the Ouse River.

Birdsall Marsh is located on the north side of CR 2 between CR 38 and Birdsall Line. At around 20 ha in extent, the marsh is dominated primarily by cattail and bordered by willow and alder thicket swamp. The dense cattail growth is interrupted by a few ponds and channels associated with Birdsall Creek. The marsh and all surrounding land north of CR 2 is in private ownership and should not be entered.