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Fantastic Fireflies

Green Hills Preserve | Sat, June 29, 2019, 8:30pm - 10:00pm

Experience the magic of Green Hills after dusk, when fireflies flicker and flit across the preserve’s rolling meadows. Local naturalist Mike Slater highlights flashy features of these unique, nocturnal insects.


Green Hills Preserve
550 Gunhart Road
Mohnton , PA 19540


June 29, 2019
8:30pm - 10:00pm

Green Hills Preserve is a bucolic mixture of gently rolling farm fields, woodlands, and wetlands. A tributary to Allegheny Creek, a state-designated “Cold Water Fishery” stream, bisects the preserve.

The Preserve is situated within the Schuylkill Highlands, a region at the nexus of two landscapes that have been prioritized for protection: the Highlands (as defined by the US Congress) and the Schuylkill River watershed. The area’s importance derives from the need to protect water quality, conserve habitat, and develop recreational opportunities in a region set for considerable growth over the next 20 years.

Located not far from an old stone springhouse—and fed by the cool, clear springs there—stands a towering red maple. This massive specimen has a trunk circumference of 188 inches (about five feet in diameter!) and is about 75 feet tall with a crown spread of 95 feet. In 2014, this giant was added to the official list of Pennsylvania Big Trees.


  • Dress for the season and wear sturdy shoes for walking trails in the dark.
  • You may bring a small flashlight to use sparingly.
  • Leave four-legged friends at home.
  • No bathrooms onsite, please plan accordingly. Though there is a full-service Turkey Hill nearby, at 3248 Morgantown Rd, Mohnton, PA 19540.
  • Check directions ahead of time, as cell service may be spotty in this rural location.


Registration required. Please complete and submit the secure, on-line registration form below to let us know you are coming, or call 610-353-5587 ext. 221. Event is free for Natural Lands members, $5 for non-members.

Events may be cancelled due to inclement weather or low registration. In that case, we will make every effort to update our website and contact registrants. Note that we cannot offer refunds of paid registrations or ticket purchases, but rest assured that your donation will help us in our work to save open space, care for nature, and connect people to the outdoors.

Photography policy:
Attendance at Natural Lands programs and events constitutes consent to be photographed for use in print and electronic media. Images will not be identified using full names without written approval from the individual. Please notify Natural Lands staff if you would prefer that your photo not be used.