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.
Connecticut designated the American Robin (Turdus migratorius) as the official state bird in 1943. Robins are a true thrush and one of America's favorite songbirds. The American Robin is also a state symbol of Michigan and Wisconsin.