Frogs in Pennsylvania: identification guide and best places to start
Yes, frogs are widespread across Pennsylvania. Start your search near calm freshwater in spring and early summer. Listen for their calls at dusk and after rain. Most common species include Green Frogs and Spring Peepers. Early morning or just after storms give you the best chance to see them.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
- 8
- species recorded
- May, June, July
- peak months
Verified species, source iNaturalist
16 types of frogs recorded in Pennsylvania
16 frog species have a verified observation record in Pennsylvania, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.
2 of the 16 shown are recorded as introduced to Pennsylvania rather than native.
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Also recorded in Pennsylvania
| # | Species | Scientific name | Records |
|---|---|---|---|
| 13 | Cuban Tree FrogOsteopilus septentrionalis | Osteopilus septentrionalis | 19 |
| 14 | Mountain Chorus FrogNativePseudacris brachyphona | Pseudacris brachyphona | 16 |
| 15 | Eastern SpadefootNativeScaphiopus holbrookii | Scaphiopus holbrookii | 15 |
| 16 | Squirrel Tree FrogIntroducedDryophytes squirellus | Dryophytes squirellus | 12 |
Plus 7 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.
Real sighting data, source iNaturalist
42,034 verified observations on iNaturalist of frog have been recorded in Pennsylvania, most often in May, June, July.
When frog are recorded in Pennsylvania
Yes, frogs are widespread across Pennsylvania. Start your search near calm freshwater in spring and early summer. Listen for their calls at dusk and after rain. Most common species include Green Frogs and Spring Peepers. Early morning or just after storms give you the best chance to see them.
Where are frogs most common in Pennsylvania?
Frogs in Pennsylvania are most often found near still or slow-moving freshwater. Target wetlands, marshes, beaver ponds, farm ponds, and wooded streams. Listen for their calls at dusk from April through July. For a broader look at the state's wildlife, visit the/wildlife/pennsylvaniahub. The/animals/frogpage has more on frog behavior and identification.
What is the best time of year to see frogs?
Spring is the peak season. After heavy rain and when nighttime temperatures stay above 50掳F, frogs become very active. The first warm rains in March or April often trigger mass breeding choruses. Summer evenings remain good, especially after thunderstorms. For timing of specific species, the/animals/frogguide has call calendars.
How do you identify a frog in Pennsylvania?
Check skin smoothness, eye position, and toe pads. Frogs have smooth, moist skin, while toads are warty and dry. Tree frogs have large toe pads for climbing. Look for the dark triangle between the eyes on Spring Peepers or the yellow throat of male Green Frogs. The/animals/frogidentification section gives side-by-side comparisons.
See ourstate animal guidefor the next step.
What are the most common frog species in Pennsylvania?
The Green Frog is widespread near any water. The Bullfrog is larger with a deep call. The tiny Spring Peeper fills early spring nights with peeps. Gray Tree Frogs have a musical trill. For quick ID, the Green Frog has two ridges down its back, the Bullfrog has none. More species are detailed on the/animals/frogspecies list.
Where can you spot frogs in your own backyard?
Even a small garden pond or a damp corner can attract frogs. Keep leaf litter and logs for cover. Avoid pesticides. Listen after dusk in spring. Gray Tree Frogs often cling to windows or porch lights at night hunting insects. For more backyard tips, see/wildlife/pennsylvania.
How do weather and heat affect frog activity?
Frogs are ectothermic, so they rely on warm, humid conditions. Heavy rain drives them to breeding sites. Hot, dry weather sends them underground or deep into mud. Best odds come on warm, cloudy days with recent rain. Nighttime temperatures above 55掳F keep them calling. Herons often hunt frogs in these same conditions; see/animals/heronfor more.
Where should you plan your frog spotting trip?
Use the widget below to find lodging near prime wetlands and state parks in Pennsylvania. Book a cabin or campsite close to water for early morning walks. Grab a lightweightwildlife t-shirtfor your trip.
Celebrate your frog sightings with artwork
Bring the frogs you've spotted home with these prints. Each one captures the colors and patterns of different frog species.
Red Eyed Tree Frog Limited-Edition Print
A vivid framed print that shows off the bright red eyes and green body of this rainforest species. Fine art paper with sharp detail.Check Price and Availability
Pine Barrens Tree Frog Limited-Edition Print
A limited edition print of a less common species. The purple and green tones stand out on any wall.Check Price and Availability
Wall art print: Frog by Eimear Maguire
A stylized illustration perfect for a gallery wall. Available framed or unframed on fine art paper.Check Price and Availability
Frequently asked questions about frogs in Pennsylvania
**Are there poisonous frogs in Pennsylvania?** No native frogs are dangerously poisonous. The Fowler's Toad has glands that can irritate skin, but it's a toad, not a frog. **When do frogs start calling?** The Spring Peeper is first, calling as early as March. Most others begin in April. **What is the largest frog in Pennsylvania?** The Bullfrog can reach 8 inches. **Can you keep a frog as a pet?** It's best to leave them in the wild. Some species are protected. **Do frogs hibernate?** Yes, they burrow into mud or leaf litter in winter.
See ourtour planning ideasfor the next step.
Gear and field guides
Plan your trip
Best time to see frog in Pennsylvania: May, June, July
See the month-by-month sighting calendar.
Plan your frog sighting in Pennsylvania
Where to look in Pennsylvania
- Appalachian National Scenic Trail 路 Wildlife Watching, Birdwatching 路 Find hotels
- Captain John Smith Chesapeake National Historic Trail 路 Wildlife Watching, Birdwatching 路 Find hotels
- Chesapeake Bay 路 Wildlife Watching 路 Find hotels
- Delaware Water Gap National Recreation Area 路 Wildlife Watching, Birdwatching 路 Find hotels
- Fort Necessity National Battlefield 路 Wildlife Watching, Birdwatching 路 Find hotels
- Friendship Hill National Historic Site 路 Wildlife Watching, Birdwatching 路 Find hotels
Frequently asked questions
What frog species live in Pennsylvania?+
Frogs in Pennsylvania are most often found near still or slow-moving freshwater. Target wetlands, marshes, beaver ponds, farm ponds, and wooded streams. Listen for their calls at dusk from April through July. For a broader look at the state's wildlife, visit the/wildlife/pennsylvaniahub. The/animals/frogpage has more on frog behavior and identification.
Where can you see frogs in Pennsylvania?+
Frogs in Pennsylvania are most often found near still or slow-moving freshwater. Target wetlands, marshes, beaver ponds, farm ponds, and wooded streams. Listen for their calls at dusk from April through July. For a broader look at the state's wildlife, visit the/wildlife/pennsylvaniahub. The/animals/frogpage has more on frog behavior and identification.
When is the best time to see frogs in Pennsylvania?+
Frogs in Pennsylvania are most often found near still or slow-moving freshwater. Target wetlands, marshes, beaver ponds, farm ponds, and wooded streams. Listen for their calls at dusk from April through July. For a broader look at the state's wildlife, visit the/wildlife/pennsylvaniahub. The/animals/frogpage has more on frog behavior and identification.
Keep exploring
More places to see frog
More wildlife in Pennsylvania
Common questions about frogs