NH Audubon Society's Raptor Observatories. During September and October, thousands of raptors are counted as they pass over Carter Hill. Volunteers from the Audubon Society collect scientific data on raptor migration in New England and use Carter Hill as an environmental "classroom" for visitors. It is free to anyone who visits the orchard and binoculars for viewing the birds are even provided to visitors up on the observation tower!
This is my dad and his "signature pose" on the deck of the observatory tower. The sign he's standing next to identifies each of the mountains you can see from the tower.