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.
About the Alabama State Bird. The bird named as the yellow-hammer by the Alabama Legislature back in 1927 is most often referred to today as the northern flicker, common flicker or simply flicker. Yellow-hammer is more often spelled yellowhammer.