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.
The legislation reads: The Alaska Willow Ptarmigan (Lagopus lagopus alascensis Swarth) is the official bird of the state. NOTE: The Lagopus lagopus alascensis is a subspecies of the Lagopus lagopus and was first noted by Swarth in 1926. Excerpt from John J. Audubon's Birds of America (pub. 1831 - 1839).