This IBA covers the riparian corridor along Pymatuning Creek in Trumbull County from the Ashtabula County line about 15 miles south and east to the Pennsylvania State line. Much of the corridor is managed by ODNR Division of Wildlife as the Shenango Wildlife Area, with a mixture of marshland (4%), brush-land (15%), open land (21 %), and wet second-growth woodland (60%) of pin oak, green ash, elm, sugar and red maples, and a mixture of hickories. The Shenango Wildlife Area is leased from the U.S. Army Corps of Engineers as part of the Shenango River Reservoir project, with a dam and reservoir in Pennsylvania. The Shenango Reservoir downstream has been identified as an Important Bird Area by Pennsylvania.
Large numbers of migrant waterfowl pass through the area in spring and fall. Beaver impoundments provide much of the wetland acreage for waterfowl. Northern Waterthrush and Veery are priority breeding species. The area is a historical Black-throated Blue Warbler nesting site. Additional notable breeding species include Hooded Merganser, Pied-billed Grebe, Sora, Virginia Rail, Common Moorhen, Alder Flycatcher, and Least Flycatcher.