Hoover Nature Preserve–Mud Hen Marsh

Tips for birding Mud Hen Marsh
Mud Hen Marsh located at the intersection of Sunbury Road and Big Walnut Road. The entrance and parking lot are 100 yards west on Big Walnut Road. Mud Hen Marsh is an area of wetlands, controlled succession forest, and swamp forest. There is a short trail that leads to an observation blind. From here you can see ducks, herons, shorebirds, and warblers among other species. The exit stream goes under Big Walnut Road and the bridge is a good area to look for Prothonotary Warblers, Wood Ducks, Red-headed Woodpeckers, and Bald Eagles.
From Charles Bombaci

Mud Hen Marsh is a popular birding spot for viewing red-headed woodpeckers and warblers. There are natural surface trails throughout the wooded and open areas and an observation blind that looks out over the meadow and pond.
From Columbus Nature Preserves webpage

About Hoover Nature Preserve
Access Areas with trails — Mud Hen Marsh, Ox Bow Road, Hoover Meadows, Dustin Road, Areas L, M, and N, Clover Field
+ over 925 acres
+ vital migratory stopover for over 33 different species of shorebirds
+ largest breeding population of state special concern Prothonotary Warblers in Ohio
+ 1,500-foot boardwalk at Area M
+ observation blind at Mud Hen Marsh
+ Bald Eagles frequently observed throughout the year

Restrooms at locations identified on Hoover Reservoir map.