Nancy H. DeStefanis, American environmental educator, field ornithologist and lecturer, presents the lifecycle of the magnificent Great Blue Herons which breed at Blue Heron Lake (formerly Stow Lake) in Golden Gate Park. She discovered the first nest in 1993. To date 297 chicks have fledged there.

DeStefanis, Founder and Executive Director of San Francisco Nature Education, monitors and teaches about the colony through her birding programs for children and adults. Heron Watch, her premier program begins April 13^th for six Saturdays at Blue Heron Lake. For more information, visit www.sfnature.org