Seen This Week: Massive Migration in Southern PA

Sandhill cranes over Allegheny County, 2 Jan 2026 (photo by Amy Henrici)

3 January 2026

Sandhill Cranes on the move:

On New Year’s Day three people in Allegheny County heard and saw a large flock of sandhill cranes flying south. Cranes are so unusual in Pittsburgh that they spawned Rare Bird Alerts.

Steve Gosser captured a photo of them over his backyard. (Blue sky!)

Sandhill cranes flying over Allegheny County, 1 Jan 2026 (photo by Steve Gosser)

It is likely this flock contains birds that Steve saw in northwestern PA in December.

Sandhill cranes at Volant, PA December 2025 (photo by Steve Gosser)

I thought Steve’s sighting was a One Day Wonder but yesterday Amy Henrici and Pat McShea saw a similar-sized sandhill crane flock circling over Aspinwall Riverfront Park. Look closely at Amy’s photo at top and you’ll notice that one of the cranes is missing a leg.

Sandhill cranes flying over Aspinwall, PA, 1 Jan 2026 (photo by Amy Henrici)

I was sorry to miss the cranes because I’m out of town, but what I saw here made up for it.

Snow Geese on the move:

Yesterday while on Route 222 near Breinigsville, Lehigh County, PA I saw thousands of snow geese flying west, bunching up, circling and coming in to land. This photo from Wikimedia is very similar to what I saw. I tried to count. 10,000?

Huge flock of snow geese circling where they’re going to land (photo from Wikimedia Commons)

I followed them to nearby cornfields and took photos with my cellphone.

Snow geese in a cornfield near Breinigsville, PA, 2 Jan 2026 (photo by Kate St. John)

Dark phase snow geese in the flock used to be called “blue” goose.

Snow geese in a cornfield near Breinigsville, PA, 2 Jan 2026 (photo by Kate St. John)

Why such massive bird migration into southern Pennsylvania?

Snow geese and sandhill cranes can stay north as long as there’s food but they move south when the ground is so snow covered that they cannot forage.

For instance the eastern North America population of snow geese overwinters in Atlantic coastal areas from Cape Cod to North Carolina but will stay in eastern PA if there’s not a lot of snow.

Snow goose range map from Wikimedia Commons (blue = winter range)

Sandhill cranes have a small breeding population in northwestern PA that will stay year-round if it can.

Sandhill crane range map from eBird Science

However, in the past three days a lot of snow fell in upstate New York and northwestern PA. There are more than 30 inches on the ground in Oswego County, NY!

Snow on the ground as of 2026-01-02, 8pm from weather.gov

My hunch is that the weather drove both species south but the snow will melt very soon. At Volant where Steve took the sandhills’ photo last month, the temperature will rise to 40°F on Tuesday and keep going to 56°F on Friday.

By midweek these birds can all go home.

One thought on “Seen This Week: Massive Migration in Southern PA

  1. Thank you so much for this post! The sandhill cranes flew right over our house in Squirrel Hill, and we didn’t know what they were. It’s exciting to know now!

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