Where does Walden Pond’s water come from and flow to? How many intriguing habitats are around Egg Rock? Are spotted sandpipers scarce on the Assabet River? Does Spencer Brook migrate? Is there wild rice in the area named for John Quincy Adams? A different Concord comes alive with this presentation by Richard T. T. Forman, a professor emeritus at Harvard University. The program will feature recently captured aerial photography, plus selections from the holdings of the William Munroe Special Collections. This program is co-sponsored by the William Munroe Special Collections.