The Auk is a family of seabirds that includes the GUILLEMOT, SEABIRD, RAZORBILL, PUFFIN, Murre, ROTCHE, and BIRD. These birds are found in the Northern Hemisphere and are known for their black and white plumage. They are also known for their ability to dive underwater in search of food. The GUILLEMOT is a medium-sized SEABIRD with a black back and white belly. The SEABIRD is a small SEABIRD with a black head and white body. The RAZORBILL is a large SEABIRD with a black head and white body. The PUFFIN is a small SEABIRD with a black head and white body. The Murre is a medium-sized SEABIRD with a black back and white belly. The ROTCHE is a small SEABIRD with a black head and white body. The BIRD is a small SEABIRD with a black head and white body. All of these birds are members of the Auk family and share similar characteristics.