The work provides an updated crayfish species lists for ten National Park Service (NPS) properties in Pennsylvania after conducting comprehensive crayfish surveys of selected streams within the parks.

The objectives of this study were to (1) determine if a reproducing population of crayfish belonging to the C. acuminatus complex occurs in Valley Creek within VFNHP; (2) conduct a comprehensive survey of Valley Creek within VFNHP and produce a list of all the crayfish species that occur there; and (3) determine the basic life history characteristics (e.g., size structure, sex ratio), reproductive status, and habitat preferences of the crayfish species that occur in Valley Creek within VFNHP.