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.
Official State Bird of Louisiana. The brown pelican (Pelecanus occidentalis) was designated the official state bird of Louisiana in 1966. Early European settlers were impressed with the pelican's generous and nurturing attitude toward their young, and the brown pelican has been a symbol of Louisiana since that time.