In late August, Buckingham Township announced new solar-powered wildlife crossing signs on Upper Mountain Road near Buckingham Mountain Preserve. They were installed with Heritage Conservancy. The signs flash on certain evenings during the spring and fall amphibian migrations. Most people link amphibians crossing roads with early spring, when salamanders head to flooded woodland pools. The fall half of that schedule is easy to miss, and it exists because of one salamander with a backward calendar. It mates and lays its eggs in pool basins that are still dry. That makes the rainy nights of September, October and November part of the amphibian year in southeastern Pennsylvania, not an afterthought to it.
If you drive Upper Mountain Road after dark this month, here is what a flashing sign means, what moves on wet fall nights, and where you can walk on the mountain without a car.
What the Township Actually Announced
The Township's notice, posted August 31, 2026, is short and specific.
"The solar-powered signs are designed to flash on select evenings during the spring and fall amphibian migration seasons, when frogs, salamanders, and other wildlife are most likely to be crossing the roadway. During these rainy migration nights, volunteers may also be along the roadway helping amphibians cross safely."
A few things follow from that wording. The signs don't flash every night. They're tied to migration evenings, and the Township describes those as rainy. The animals named are frogs, salamanders and other wildlife. When Patch covered the signs on September 4, its headline joked about lizards and reptiles. The animals these signs protect are amphibians. Lizards are reptiles, and they don't make these seasonal trips to breeding pools.
Neither the Township nor Heritage Conservancy has published a species list or a count for this stretch of road. So we can't say which salamanders cross Upper Mountain Road on a given night. What Pennsylvania's own wildlife agencies do publish is why amphibians in this part of the state move in two seasons, not one.
The Salamander That Breeds in a Dry Pool
Pennsylvania has a group called mole salamanders that depend on vernal pools. These are shallow, seasonal woodland pools that fill in winter and spring and dry out by late summer. Most of them follow the timeline people know. The Pennsylvania Natural Heritage Program calls the spotted salamander the state's most common mole salamander. It moves to seasonal pools early in spring and generally lays its eggs between mid-March and mid-April.
The marbled salamander does it the other way around. According to the same agency, adults migrate to seasonal pools to court and mate in early fall. The female lays her eggs sometime between September and November, and local temperature mostly sets the timing. She builds a nest of 48 to 200 eggs under leaves, logs or rocks in the empty pool basin. She usually stays with them until rain or snowmelt starts to fill the pool.
The state's vernal pool field brochure gives the scene directly. Marbled males and females meet in dry pool basins "on rainy nights in fall." Once the pool partly fills, which the brochure says usually happens with the first tropical storms of the fall, the female goes back to the nearby woods and finds a burrow for the winter.
There's a reason for the odd timing. Marbled larvae hatch soon after the nest floods and feed for months before spotted and Jefferson salamander larvae hatch in spring. They're also the first mole salamanders to finish their larval stage.
| Spotted salamander | Marbled salamander | |
|---|---|---|
| Breeding migration | Early spring | Early fall |
| Pool condition at breeding | Flooded | Dry basin, filling later |
| Egg-laying window in Pennsylvania | Mid-March to mid-April | September to November |
| Appearance | Yellow spots on a dark background | Stocky and black with white or silvery bands |
| What the larvae get | A spring start | A head start of several months |
The Pennsylvania Fish and Boat Commission describes the marbled salamander as dark gray to black with bold white or silvery crossbands. It lives in woodlands, low swampy areas and fairly dry hillsides, and it prefers drier habitat than its relatives. The Natural Heritage Program adds that it generally uses seasonal pools in upland forests that flood in winter and spring. That's the general biology for the state. Whether marbled salamanders use the pools near Buckingham Mountain isn't documented in anything published so far. The fall half of the Township's sign schedule still makes sense against that state-level calendar.
What a Flashing Sign Asks of a Driver
The Township's request is simple, and it comes straight from the notice. When the signs are flashing, drivers are asked to:
- Slow down.
- Stay alert.
- Watch for wildlife and for volunteers on the roadway.
The volunteers matter most. On rainy migration nights, the Township says, people may be standing along Upper Mountain Road helping amphibians across. A two-lane road on a wooded hillside, after dark, in the rain, with people walking along the shoulder, calls for real care. It's the reason the signs are solar-powered and flash on specific nights. A permanent static sign would be easy to tune out.
None of the published material sets a temperature threshold for a migration night. The state brochure ties marbled salamander movement to rain, and the Township ties the flashing signs to rainy migration evenings. For anyone who drives the road regularly, the forecast is the practical cue. A wet evening in October is more likely than a dry one to find the signs on.
Where the Volunteers Come From
Heritage Conservancy has done this kind of work in Bucks County before. The conservancy reported a partnership of staff and residents at Quakertown Swamp that rescued almost 1,000 amphibians in late February 2012 and recorded species and counts for a scientific report. That was a different place and a different season. It does show the conservancy has run amphibian crossings with local volunteers in the past, not just put up signs.
No crossing-specific signup or migration alert list for Upper Mountain Road has been published. Heritage Conservancy's general volunteer page says new volunteers have to register first. It directs questions to Kaylyn Brindisi at [email protected] or 215-345-7020 x157. Residents of the mountain who'd rather be on the shoulder than behind the wheel on a migration night can start there.
Where to Walk on the Mountain This Fall
The signs are near Buckingham Mountain Preserve, but the preserve itself doesn't appear on Heritage Conservancy's current preserve guide. We couldn't find any current published trailhead, parking area or hours for it. Until the conservancy posts visitor information, the hilltop is best treated as habitat, not as a public trail.
The conservancy's public preserve in Buckingham Township is Jackson Pond, on the other side of the mountain along Lower Mountain Road.
- Location: About 3666 to 3766 Lower Mountain Road in Furlong, on 10 acres.
- Parking: The grassy area at the entrance off Lower Mountain Road, between Stump and Forest Grove roads. Look for the driveway marked by two red poles.
- Hours and rules: Sunrise to sunset. Leashed pets are welcome and motorized vehicles aren't allowed. Deer management can close trails temporarily.
- Trails: A flat, mowed 0.4-mile figure-eight through the Pollinator Meadow, and a 0.3-mile Pond Loop with paved and dirt sections and boardwalks.
The conservancy lists frogs and tree frogs among the wildlife at Jackson Pond. The two loops together come to less than a mile, so a full lap fits easily into a fall afternoon before the sunset closing time.
Heritage Conservancy's October calendar doesn't include anything on Buckingham Mountain or at Jackson Pond. Its two public walks this month are elsewhere in Bucks County. A guided fall foliage hike at Fuller-Pursell runs Saturday, October 17, from 1:00 to 2:30 p.m. A night-time glow hike at Croydon Woods runs Friday, October 23, from 6:30 to 8:30 p.m. Both are listed on the conservancy's events page.
Living near preserved land comes with seasonal routines like these flashing signs, and they rarely show up on a map. If you own on Buckingham Mountain or are thinking about a property near its preserves, Lisa Povlow and our team would be glad to talk through how that land is protected and what it means for the homes around it. Schedule a private consultation.
