Avian Surveys at Effigy Mounds National Monument
Stravers JW, McKay KJ, McClanahan T. 2003. Avian Surveys at Effigy Mounds National Monument. Technical report NPS/HTLN/P6370020493. National Park Service. Hampton, Illinois
During the spring and summer of 2002, nesting bird surveys were conducted within Effigy Mounds National Monument with special attention to the newly acquired Heritage Addition. Point Count Surveys were conducted on eight days during the breeding season and additional information was collected during the breeding season as well as during the spring and fall migration. One hundred and twenty four bird species were observed – 82 during the point count surveys, 14 during the breeding season (but not during point counts), and an additional 28 during migration.