Cold agglutinin disease. Cold agglutination - at body temperature, the antibodies do not attach to the red blood cells. At lower temperatures, however, the antibodies react to Ii antigens, bringing the red blood cells together, a process known as agglutination.
American Robin (Turdus migratorius). The robin red breast was designated as the state bird of Michigan by House Concurrent Resolution No. 30, the Senate concurring, on April 8, 1931.
Michigan's State Flower is the apple blossom. In adopting the apple tree's blossom as state flower on April 28, 1897, Chapter 2, Section 2.11 of Michigan Compiled Laws specifically refers to Pyrus coronaria as one of the most fragrant and beautiful flowered species of apple that is native to Michigan.