different between trochil vs trochid

English

From Latin trochilus (“probably applied to a wren”)

trochil (plural trochils)

The crocodile bird, Pluvianus aegyptius.
- 1638, Sir Thomas Herbert, 1st Baronet Some yeares travels into divers parts of Asia and Afrique., 2. ed. revised and enlarged.
  The crocodile […] opens his chaps to let the trochil in to pick his teeth, which gives it the usual feeding.

trochid (plural trochids)

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