本研究通过追踪两种近缘天鹅（Tundra Swan, TS和Whooper Swan, WS）的迁徙轨迹，揭示了伯格曼法则在年度周期中的动态适用性：夏季因雪融期限制，较小体型的TS繁殖于更高纬度；冬季因低温代谢需求，较大体型的WS越冬更靠北。研究创新性结合迁徙生态与生理约束，为理解动物地理分布机制提供了实证。

每年10月中旬，大约8,200只苔原天鹅（又称“小天鹅”，tundra swan）不约而同从西伯利亚起飞，来到英国过冬。但是今年它们仍然未见踪影，原因何在 ...

The tundra swan, also known as the whistling swan, is a large handsome white bird with coal black legs and feet and a matching black bill.

(LA)[ CYGNUS COLUMBIANUS ] Barely seen against the milky autumn sky, flocks of high-flying tundra swans arrive in California this month. Tundra swan - Los Angeles Times ...

Grey Wheeler describes the tundra swan as a “beautiful bird.” And he wants another one – stuffed and mounted in the trophy room of his Hampton home.Last December, while squatting in the icy ...

Just before winter sets in, more than 100,000 tundra swan migrate from their remote breeding grounds in the Arctic, along the Pacific Flyway, to spend winter in California. The tundra swan along ...

Tundra swan numbers are increasing by a few percent every year. In a 2015 census, the U.S. Fish and Wildlife Service estimated there were about 117,000 tundras in the Eastern population and about ...

Grey Wheeler describes the tundra swan as a “beautiful bird.” And he wants another one – stuffed and mounted in the trophy room of his Hampton home.Last December, while squatting in the icy ...

A Florida man who killed a protected tundra swan in front of a group of birdwatchers last winter has received a lifetime hunting ban, along with six months probation and $1,500 in fines, according to ...

Stepping out of the house, I immediately hear a familiar and wonderful sound. A sound that I only hear at this time of year. It is a high-pitched and smooth bugling call, given over and over. The s… ...

Bird, which is being treated by rehab specialists, is one of possibly 3 tundra swans that have been shot illegally over the past year at Ladd Marsh ...