Hawk Mountain Sanctuary

Hawk Mountain Sanctuary is a wild bird sanctuary in Albany Township and East Brunswick Township, located along the Appalachian flyway in eastern Pennsylvania. The sanctuary is a prime location for the viewing of kettling and migrating raptors with an average of 20,000 hawks, eagles and falcons passing the lookouts during the late summer and fall every year. The birds are identified and counted by staff and volunteers to produce annual counts of migrating raptors that represent the world's longest record of raptor populations. These counts have provided conservationists with valuable information on changes in raptor numbers in North America.

• http://en.wikipedia.org/wiki/Hawk Mountain Sanctuary