1. Acopian Center for Conservation Learning, Hawk Mountain Sanctuary, 410 Summer Valley Road, Orwigsburg, PA 17961 USA and Department of Biological Sciences, East Stroudsburg University, 200 Prospect Street, East Stroudsburg, PA 18301 USA
2. Acopian Center for Conservation Learning, Hawk Mountain Sanctuary, 410 Summer Valley Road, Orwigsburg, PA 17961 USA
3. Department of Biological Sciences, East Stroudsburg University, 200 Prospect Street, East Stroudsburg, PA 18301 USA