The airplane received substantial damage on impact with a bird identified as a Common Loon (Gavia immer) during approach to runway 23. The pilot reported that the right wing of the airplane struck the bird during the downwind leg of the approach at 1,700 feet mean sea level and 120 knots. The right wing was crushed inward and wrinkled at the impact location. The airplane landed without further incident. The average weight of the Common Loon is 132 ounces.