Pennsylvania Duck Migration Forecast

Where PA birds come from

About four in five of the mallards shot in Pennsylvania spent the summer here, so local ice moves them as much as anything to the north. The rest come down from New York, Ontario and Quebec, and cold across upstate New York is what pushes them onto the rivers and Lake Erie.

DuckCast watches the Lake Ontario plain and upstate New York for the freeze and snow that start birds moving, then reads NEXRAD after dark to see whether they actually flew. The upstream picture is why a score can rise here before anything changes in your own sky.

The 9 regions we score in Pennsylvania

Every region gets its own daily score. Reports are generalized to the region, so nobody burns your spot.

• Lake Erie and Presque Isle

  Erie County: Presque Isle Bay, the open lake and the shoreline. The last water in the state to ice, where late mallards and black ducks hold into January.

• Pymatuning and the Northwest Marshes

  Crawford, Mercer and Venango: Pymatuning, Conneaut Marsh, Erie Refuge and Shenango. The state's best puddle duck marsh, and among the first to lock in December.

• Three Rivers and Lake Arthur

  Pittsburgh and the southwest: the Ohio, Allegheny and Monongahela pools, Lake Arthur and the farm ponds. River water that stays open after the ponds lock.

• Allegheny Forest and the Pennsylvania Wilds

  Warren to Clearfield: the Allegheny River, Kinzua and beaver swamps in big timber. Wood duck country first, with little open water once it freezes.

• Raystown and the Southern Alleghenies

  Somerset to Huntingdon: Raystown Lake, the Juniata and the mountain reservoirs. Deep water holds open late; small water locks early.

• West Branch and the Central Valleys

  Centre to Northumberland: the West Branch Susquehanna, the Juniata valleys and the farm country where the branches meet at Sunbury.

• North Branch, Endless Mountains and the Poconos

  Tioga to Pike: the North Branch Susquehanna, the Wyoming Valley, Lake Wallenpaupack and the Upper Delaware. Ponds lock early; the river holds birds.

• Lower Susquehanna and Middle Creek

  Harrisburg to the Maryland line: the river pools above Conowingo, Middle Creek and the Lancaster and York farm country. Snow geese in late winter, mallards and blacks on open river into January.

• Delaware River and the Lehigh Valley

  Philadelphia to Easton: the tidal Delaware, the Lehigh Valley and the Berks farmland. Atlantic Population geese and the big early-winter snow goose flocks.

Common questions about Pennsylvania

When does the duck migration peak in Pennsylvania?

DuckCast's season model puts the wood duck peak in Pennsylvania around mid October. That is a modelled typical curve, not a prediction for any single year: the actual push depends on cold fronts and freeze-up upstream, which is what the daily score tracks. Always confirm season dates with the Pennsylvania Game Commission.

Where do Pennsylvania's ducks come from?

About four in five of the mallards shot in Pennsylvania spent the summer here, so local ice moves them as much as anything to the north. The rest come down from New York, Ontario and Quebec, and cold across upstate New York is what pushes them onto the rivers and Lake Erie. DuckCast reads conditions across the Lake Ontario plain and upstate New York and watches for the freeze that pushes birds south, so a PA hunter sees the push building before it arrives.

Which parts of Pennsylvania does DuckCast cover?

All 9 regions: Lake Erie and Presque Isle, Pymatuning and the Northwest Marshes, Three Rivers and Lake Arthur, Allegheny Forest and the Pennsylvania Wilds, Raystown and the Southern Alleghenies, West Branch and the Central Valleys, North Branch, Endless Mountains and the Poconos, Lower Susquehanna and Middle Creek, Delaware River and the Lehigh Valley. Each gets its own daily score. Locations are always region-level; DuckCast never collects or shows exact hunting spots.

Does DuckCast use weather radar in Pennsylvania?

Yes. DuckCast decodes raw NEXRAD Level II volumes from the 4 National Weather Service radar sites covering Pennsylvania, and reads how much bird mass lifted off after sunset and which way it tracked. Separately, 8 upstream weather stations across the Lake Ontario plain and upstate New York feed the freeze line; those are weather reports, not radar. Radar sees every bird in the air, not just ducks, so read it as evidence that a migration happened rather than a duck count.

When is the best time to duck hunt in Pennsylvania?

For wood duck, the modelled peak in Pennsylvania falls around mid October, and the strongest hunting is usually the weeks on either side of it. Inside that window the best mornings follow a cold front with a hard freeze across the Lake Ontario plain and upstate New York and a north wind behind it, which is exactly what the daily PA score measures. Season dates are set by the Pennsylvania Game Commission, and the peak is a modelled typical year rather than a promise about this one.

Where can I find a Pennsylvania waterfowl report?

PA Game Commission publishes the official Pennsylvania regulations and, during the season, survey counts and reports, so start there for anything legal. DuckCast adds a daily migration score for each of the 9 PA regions, built from live weather, the freeze across the Lake Ontario plain and upstate New York, crop progress and hunter reports, and each morning it reads NEXRAD radar to say whether birds actually moved over the region after dark. Hunter reports filed in the app are generalized to the region, never to a spot.