Olive-sided Flycatcher Bumper StickerAll of our $12 bumper stickers fund the planting of at least 50 hardwood tree seeds, prioritizing species of oak, ash, hickory, maple, sycamore, cherry, and the tulip poplar, as well as contribute to our other conservation and nature education efforts, which include free tree giveaways, cleanups, free nature walks, and species specific conservation plans. .: Material: water resistant vinyl .: Waterproof sticky adhesive .: Suitable for indoor and