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.
Kirtland's Warbler Working Together to Save a Special Bird Managing the forest for the Kirtland's warbler. PDF Version . Michigan is home to one of the world's rarest birds . . . the Kirtland's warbler. This small, energetic bird was one of the first to be listed as endangered after the Endangered Species Act of 1973 was passed by Congress.