KLEINFELTERSVILLE, Pa. (AP) — Birdwatchers gather before dawn at Middle Creek in Pennsylvania to witness thousands of migrating snow geese lifting off from the reservoir in a swirling mass. The display lasts only minutes before the birds fan out to nearby farm fields to feed as they continue their annual spring migration north toward New York and Quebec. For a few short weeks each year, the migration draws crowds of nature lovers to the refuge, which was created decades ago to attract waterfowl and now welcomes about 150,000 visitors annually.

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Early-rising birders await sunrise at Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Early-rising birders await sunrise at Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Early-rising birders await sunrise at Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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A flock of snow geese arrives to spend the night at the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

A flock of snow geese arrives to spend the night at the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

A flock of snow geese arrives to spend the night at the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Snow geese take off to resume their northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese take off to resume their northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese take off to resume their northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Amish birders focus their binoculars on waterfowl at Middle Creek Wildlife Management Area, Saturday, March 7, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Amish birders focus their binoculars on waterfowl at Middle Creek Wildlife Management Area, Saturday, March 7, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Amish birders focus their binoculars on waterfowl at Middle Creek Wildlife Management Area, Saturday, March 7, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Snow geese resume their annual northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese resume their annual northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese resume their annual northern migration after a stopover at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Snow geese take off from a reservoir at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese take off from a reservoir at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese take off from a reservoir at the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Pairs of tundra swans (larger birds) and Canada geese fly over the Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Pairs of tundra swans (larger birds) and Canada geese fly over the Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Pairs of tundra swans (larger birds) and Canada geese fly over the Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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The serrated edges of a snow goose's bill helps it grip the plants it eats, near the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

The serrated edges of a snow goose’s bill helps it grip the plants it eats, near the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

The serrated edges of a snow goose’s bill helps it grip the plants it eats, near the Middle Creek Wildlife Management Area, Sunday, March 8, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Tundra swans fly Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Tundra swans fly Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Tundra swans fly Middle Creek Wildlife Management Area, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Snow geese feed in a corn field near the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese feed in a corn field near the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Snow geese feed in a corn field near the Middle Creek Wildlife Management Area, Friday, March 6, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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Tundra swans and other waterfowl gather on a manmade reservoir at the Middle Creek Wildlife Management Area for a stopover, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Tundra swans and other waterfowl gather on a manmade reservoir at the Middle Creek Wildlife Management Area for a stopover, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

Tundra swans and other waterfowl gather on a manmade reservoir at the Middle Creek Wildlife Management Area for a stopover, Monday, March 9, 2026, in Kleinfeltersville, Pa. (AP Photo/Robert F. Bukaty)

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