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.
State Bird. Mockingbird. The common mockingbird (Mimus polyglottos) is a superb songbird and mimic. Its own song has a pleasant lilting sound and is, at times, both varied and repetitive. Often, the mockingbird sings all night long, especially under bright springtime moonlight.