Ousel n. (Written also ouzel) (Zool.) One of several species of European thrushes, especially the blackbird (Merula merula, or Turdus merula), and the mountain or ring ousel (Turdus torquatus).
Rock ousel (Zool.), the ring ousel.
Water ousel (Zool.), the European dipper (Cinclus aquaticus), and the American dipper (Cinclus Mexicanus).
... The ousel-cock, so black of hue, With orange-tawny bill, The throstle, with his note so true, The wren with ... — A Fairy Tale in Two Acts Taken from Shakespeare (1763) • William Shakespeare