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.
Alabama State Bird Description: The Yellowhammer is a medium to large sized woodpecker. It is grayish brown with a barred back and spotted breast and belly. The face and throat are tan and the crown is gray. There is a black crescent on chest and a red crescent on the nape of the neck. The male has a black mustache mark.