The Carden Plain IBA offers globally rare alvar habitat supporting an abundance of grassland birds, including the endangered Loggerhead Shrike and the rare Golden-winged Warbler plus Osprey, Black Terns, Sedge Wrens, Yellow Rails, Upland Sandpipers, Blue Birds, Eastern Towhees, and Brown Thrashers. Indian Paint Brush, Prairie Smoke, Tufted Hairgrass, Northern Dropseed, Little Bluestem, False Pennyroyal, Balsam Ragwort, Fragrant Sumac and Shrubby Cinquefoil are typical alvar plants.
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