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.
In 1928, the school children of Georgia selected the brown thrasher (Toxostoma rufum) as the state bird. According to Nature Magazine (April, 1932),The Campaign was inaugurated by the Fifth District of the State Federation of Women's Clubs and was sponsored by the Atlanta Bird Club and kindred groups..