This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, pelagic seabirds, passerine birds, and gulls and terns in coastal Louisiana and the Lower Mississippi River. Vector polygons represent locations of wading birds, shorebirds, waterfowl, raptors, diving birds, pelagic birds, passerine birds, and gulls and terns that may be particularly vulnerable because of nesting, migratory staging, and wintering activities. Vector points represent locations of nesting and roosting sites for shorebirds, wading birds, diving birds, seabirds, gulls, and terns. Species specific abundance, seasonality, status, life history, and source information are stored in relational data tables (described below) designed to be used in conjunction with this spatial data layer. This data set comprises a portion of the ESI data for Louisiana. ESI data characterize the marine and coastal environments and wildlife by their sensitivity to spilled oil. The ESI data include information for three main components: shoreline habitats, sensitive biological resources, and human-use resources.