terrestrial

Hooded Merganser

Length 40-48cm (16-19″). A very rare visitor (vagrant) to the Cayman Islands, known from only a single observation on Newlands Meadows. Hooded Mergansers hunt underwater, using their excellent vision. A highly transparent nictating membrane (third eyelid) closes down over the eye, protecting the eyes underwater, like a pair of built-in swimming goggles.

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