An invasive insect, the Hemlock Woolly Adelgid (HWA), is causing Eastern Hemlock tree decline in the Appalachian Mountains. The Louisiana Waterthrush (LOWA) is a bird that may indicate the degree to which HWA threatens riparian ecosystems with declining hemlock. By studying LOWA habitat use and reproductive success, I aim to determine how hemlock decline affects the birds and riparian ecosystem condition. Such knowledge is important for conserving the rich biodiversity of the Appalachians.