加拿大大雁每年冬季都会迁移到南方。
冬天到来之前这些鸟就已迁移到南方了。
The birds will have moved o the south before winter sets in .
V 形与鸣喇叭鸟类充满编队是一种象征侯鸟迁移到南方越冬地及美国，甚至墨西哥东北部。
The V-shaped formations filled with honking birds are a fall staple as the breed migrates to wintering grounds in the southern United States and even northeastern Mexico.
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