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.
W hen much of Michigan's vast forests fell to the ax and saw in the late 1800s, many woodland bird species declined. These included the common raven, wood thrush, ovenbird, American redstart, whip-poor-will, scarlet tanager, and cerulean and hooded warblers.