Turkey Calls › North Bay Corvus Blue Image 1 of 3 Image 2 of 3 Image 3 of 3 North Bay Corvus Blue $59.00 North Bay Corvus crow call. Spalted maple dyed blue then stabilized and finished with high gloss. Add To Cart Added! North Bay Corvus crow call. Spalted maple dyed blue then stabilized and finished with high gloss.