Tundra swans seen at Aylmer Wildlife Management Area in Canada
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Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)

Tundra swans are seen at the Aylmer Wildlife Management Area in Aylmer, Ontario, Canada, on March 25, 2026. From February to April every year, thousands of wild tundra swans use Ontario's Aylmer Wildlife Management Area to refuel their migration to the high Arctic Region. (Photo by Zou Zheng/Xinhua)