Explore the nightlife roaming around Central Park once the sun goes down. Urban naturalist and educator Gabriel Willow will lead groups through the park hunting for bats, possums, fireflies, cicadas, birds and more. Granted, it's a bit late in the evening, but it's also something diehard naturalists-in-training won't want to miss. To register, go to sidetour.com/experiences/explore-the-hidden-ecology-of-central-park-after-dark. Ages 8 and up.