Junior Hoilett cancelled out an earlier strike by Lee Bowyer in first-half injury time as relegation-battling Blackburn and Birmingham had to settle for a point each from a 1-1 draw.
Bowyer nodded home from point-blank range after Cameron Jerome had put a cross from Sebastian Larsson across the face of goal with keeper Paul Robinson beaten.
But Hoilett capitalised on a howler by Liam Ridgewell, racing clear to round Blues keeper Ben Foster and slide home the equaliser.
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