What's the difference between sawbill and sheldrake?

Sawbill

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Definition:

• (n.) The merganser.

Example Sentences:

Sheldrake

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Definition:

• (n.) Any one of several species of large Old World ducks of the genus Tadorna and allied genera, especially the European and Asiatic species. (T. cornuta, / tadorna), which somewhat resembles a goose in form and habit, but breeds in burrows.
• (n.) Any one of the American mergansers.

Example Sentences:

• (1) A more rigorous and transparent process would encourage social services to take greater care to justify where a child was placed, agrees Sheldrake.
• (2) If local residential provision cannot, or indeed should not, be expanded quickly, "there has to be a really huge emphasis on quality rather than cost", argues Jill Sheldrake, director of social care at Together Trust, a charity that runs residential homes in the north-west.