The term 'Black-and-White Seabird' can be described by three crossword solutions: AUK (3 letters), PUFFIN (6 letters), and GUILLEMOT (9 letters). An AUK is a small, short-billed seabird that is typically black and white in color. Puffins are also black and white seabirds with large, colorful bills. Lastly, a GUILLEMOT is a medium-sized seabird with a black back and white underside. All three of these birds are found in the Northern Hemisphere near coastal areas.