What's the difference between goosander and velvetbreast?

Goosander

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Definition:

• (n.) A species of merganser (M. merganser) of Northern Europe and America; -- called also merganser, dundiver, sawbill, sawneb, shelduck, and sheldrake. See Merganser.

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Velvetbreast

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Definition:

• (n.) The goosander.

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