The term 'They're Often Early Risers' can be solved by the crossword clue 'Birdmen' (7 letters). Birdmen are people who practice the sport of hang gliding, which involves flying a lightweight aircraft made of fabric and aluminum. Hang gliders typically take off from high points such as hills or cliffs and soar through the air using the natural lift created by the wind. Hang gliders often rise early in the morning to take advantage of the best thermals, or columns of rising air, which provide lift for the glider.