Bird Seed Sale Pick-up (for orders placed by 2/8/20). Saturday, February 15th, 10am – 2pm. Bird watching is more fun when you can attract them to your own yard, so fill your feeders with one of our special mixes. Friends of Silver Lake Nature Center Members receive a 10% discount on all Bird Seed Orders. Please place your order by calling 215-785-1177, by clicking here, or by stopping into the Visitors’ Building.