这是一种小一点的鹅（The Cackling Geese），脖子也短一点

文献说： When it comes to North American geese, distinguishing Cackling from Canada is perhaps the most challenging ID. The two birds are virtually identical—so much so that until 2004, they were considered one species: Branta canadensis. Now, due mainly to genetic differences, the Cackling Goose is formally on its own, with four regional subspecies under its wing.

这是大名鼎鼎的大鹅（Canada Geese）

北美的麻雀有20多种，北美的鸭子也有20多种，这鹅也有大有小，图案几乎一样。

如果水里有一大群鸭子在游泳，我不是观察它们红掌拨清波，而是重点观察它们有多少种类，然后决定采取什么剧本，让谁当主角，拍摄视频故事。

请看我拍摄的视频

https://youtu.be/mLfnCzvgTH4?si=xgGmlY423WcKIaHZ