Field Trips Click these links for information about Audubon’s 2nd annual Philly Birding Weekend, Oct. 13 – 15, 2023: Field Trips for Friday, Oct. 13 Field Trips and Tally Rally for Saturday, Oct. 14 Field Trips for Sunday, Oct. 15 Directions & Birding Tips Tally Rally Photo Contest Liability Release & Waiver Register Now!