Difference between Sawbill and Merganser

What is the difference between Sawbill and Merganser?

Sawbill as a noun is the red-breasted merganser. while Merganser as a noun is any of various diving ducks of the genus mergus or lophodytes, which feed on fish and have a sharply serrated bill.

We hope you now know whether to use Sawbill or Merganser in your sentence.