text:  One of the most distinctive birds in the skies above Hawaii is the Iwa, or great frigate bird. Dark black and a bit ominous looking, they have a distinctive bent wing silhouette when in flight, with long pointed wings, a long hooked bill, and a deeply forked tail. Iwa are found in oceans throughout the tropics, and while they're often seen on all the main Hawaiian islands, they nest primarily in shrubs and small trees in the northwest Hawaiian islands.