A defining feature of Western Pennsylvania English is the cot–caught merger, in which (as in "ah") and (as in "aw") merges to a rounded vowel: . As in most other American dialects, it occurs as well as the father–bother merger. Therefore, "cot" and "caught" are both pronounced ; "Don" and "dawn" are both . While the merger of the low back vowels is also widespread elsewhere in the United States, the rounded realizations of the merged vowel around is less common, except in Canada, California, India and Northeastern New England.