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 black-capped chickadee is the state bird of Maine and Massachusetts and the provincial bird of New Brunswick. In 2014, the black-capped chickadee was named the official bird of Vancouver for the year of 2015.