ouzel

[Middle English osel, from Old English ōsle.]

(click to enlarge)
Ring-ouzel (Turdus torquatus). (credit: Drawing by John P. O'Neill/EB Inc.)

Species (Turdus torquatus) of songbird in the thrush family, characterized by a white crescent on the breast. A blackish bird, about 10 in. (25 cm) long, it breeds locally in uplands from Britain and Norway to the Middle East. The name was formerly applied to a closely related European blackbird (T. merula). The dipper is often called water ouzel.

For more information on ouzel, visit Britannica.com.

The noun has one meaning:

Meaning #1: common black European thrush
  Synonyms: blackbird, merl, merle, ousel, European blackbird, Turdus merula